Bruce Willis has blamed an "error in judgement" after he was seen in a pharmacy in Los Angeles without a face covering.
The pictures appeared in the New York Post's Page Six, in a story that also claimed that he was asked to leave the shop – a branch of Rite Aid – after refusing to put on a mask.
Willis was seen wearing a bandana around his neck that he had not pulled up to cover his face.
US actor Bruce Willis scratches his head during the press conference where he presents his new movie "12 Monkeys" in Berlin on February 24. The film was entered to the competition of the 46th International Film Festival which will end on February 26.
Bruce Willis in Die Hard (Credit: 20th Century Fox)
Cast member Bruce Willis poses during a photocall for the film "Moonrise Kingdom", by director Wes Anderson, in competition at the 65th Cannes Film Festival, May 16, 2012. REUTERS/Eric Gaillard (FRANCE - Tags: ENTERTAINMENT)
Director Quentin Tarantino, actress Uma Thurman, actor John Travolta and his wife Kelly Preston, actor Bruce Willis pose on the red carpet for the screening of their film "Pulp Fiction" in competition at the 47th Cannes Film Festival in Cannes, France, May 21, 1994. REUTERS/John Schults
Actor Bruce Willis attends the European premiere of "Glass" in London, Britain January 9, 2019. REUTERS/Henry Nicholls
Cast member Bruce Willis arrives for the premiere of the film "Rock the Kasbah" in New York October 19, 2015. REUTERS/Lucas Jackson
Cast member Bruce Willis poses at the premiere of the film "Red 2" in Los Angeles, California July 11, 2013. The movie opens in the U.S. on July 19. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Actor Bruce Willis (L) and director M. Night Shyamalan arrive for the premiere of the film "After Earth" in New York May 29, 2013. REUTERS/Carlo Allegri (UNITED STATES - Tags: ENTERTAINMENT)
Cast members Dwayne Johnson (R) and Bruce Willis pose at the premiere of "G.I. Joe: Retaliation" in Hollywood, California March 28, 2013. The movie opens in the U.S. on March 28. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Actor Bruce Willis of the U.S. (R) poses with his wife Emma Heming (L) after being awarded as Commandeur des Arts et lettres (Commander in the Order of Arts and Letters) by French Culture minister Aurelie Filippetti during a ceremony at the ministry in Paris , February 11, 2013. REUTERS/Charles Platiau (FRANCE - Tags: ENTERTAINMENT POLITICS)
Actor Bruce Willis arrives for the British premiere of "A Good Day to Die Hard" at Leicester Square in London February 7, 2013. REUTERS/Luke MacGregor (BRITAIN - Tags: ENTERTAINMENT HEADSHOT)
Cast member Bruce Willis and his wife Emma Heming attend the premiere of "G.I. Joe: Retaliation" in Hollywood, California March 28, 2013. The movie opens in the U.S. on March 28. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Actor Bruce Willis listens during the news conference for the film "Looper" at the 37th Toronto International Film Festival September 6, 2012.
REUTERS/Mike Cassese (CANADA - Tags: ENTERTAINMENT)
Director Wes Anderson (L) and cast members Bruce Willis (2ndL), Edward Norton (2ndR) and Bill Murray (R) arrive on the red carpet for the screening of the film "Moonrise Kingdom" in competition at the 65th Cannes Film Festival May 16, 2012. REUTERS/Jean-Paul Pelissier (FRANCE - Tags: ENTERTAINMENT)
Cast member Bruce Willis (L) and Bill Murray (R) pose during a photocall for the film "Moonrise Kingdom", by director Wes Anderson, in competition at the 65th Cannes Film Festival, May 16, 2012. REUTERS/Yves Herman (FRANCE - Tags: ENTERTAINMENT)
Actor Sylvester Stallone (C) holds his Hollywood Career Achievement Award as he poses with California Governor Arnold Schwarzenegger (R) and actor Bruce Willis backstage at the 14th Annual Hollywood Awards Gala in Beverly Hills, California October 25, 2010. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Actor Ben Kingsley (L) poses with actor Bruce Willis after accepting a star on the "Walk of Fame" in Hollywood, California May 27, 2010. REUTERS/Mario Anzuoni (UNITED STATES - Tags: ENTERTAINMENT)
Actors Danny DeVito (L), Bruce Willis (C) and Jack Nicholson appear on stage for a curtain call following a staged reading of "The World of Nick Adams", at Davies Symphony Hall in San Francisco, California October 27, 2008. The event was held for the benefit of The Painted Turtle, Paul Newman?s Hole In The Wall California Camp. REUTERS/Robert Galbraith (UNITED STATES)
Cast member Rumer Willis (3rd from R) of the comedy film "The House Bunny" poses with her boyfriend Micah Alberti, her mother Demi Moore with husband Ashton Kutcher (L) and her father Bruce Willis (R) with his girlfriend Emma Heming at the film's premiere in Los Angeles August 20, 2008. REUTERS/Fred Prouser (UNITED STATES)
Actor Bruce Willis (C) poses with daughters Tallulah Belle Willis (R) and Rumer Glenn Willis after donating objects from the movie "Die Hard" to the Smithsonian's National Museum of American History in Washington, June 27, 2007. REUTERS/Jim Young (UNITED STATES)
U.S. actor Bruce Willis arrives at the red carpet for the German premiere of the movie "Die Hard 4.0" in Berlin June 18, 2007. REUTERS/Hannibal Hanschke (GERMANY)
U.S. actor Bruce Willis gestures before a photocall for directors Karey Kirkpatrick and Tim Johnson's out of competition animated film 'Over the Hedge' at the 59th Cannes Film Festival May 21, 2006. REUTERS/Tom Boland
Actors Bruce Willis (L) and Mos Def arrive for the premiere of the film '16 Blocks' in New York February 27, 2006. REUTERS/Keith Bedford
Actor Bruce Willis (L) presents actor Al Pacino with the 20th annual "American Cinematheque Award" in Beverly Hills October 21, 2005. Pacino is this year's award recipient for his significant contribution to the art of the moving picture. The benefit event will broadcast on AMC on January 22, 2006. REUTERS/Mario Anzuoni
U.S. actor Bruce Willis smiles during a news conference for his film "Hostage" in Tokyo May 23, 2005. The action thriller film will open in Japan on June 4. REUTERS/Yuriko Nakao YN/TC
Actor Bruce Willis poses in a pressurized flight suit in front of a
United States Air Force U-2 high-altitude aircraft at an undisclosed
airbase in southwest Asia, September 24, 2003. Willis is touring with
the United Service Organizations (USO) with his band, The Accelerators,
to entertain American military in the region. EDITORS: The location is
undisclosed at the request of the host country. REUTERS/Mike Theiler
Actor Bruce Willis, the voice of 'Spike the Dog' in the animated comedy
motion picture "Rugrats Go Wild!" is interviewed by seven-year-old
Madison Stell of Sacramento, California during the premiere of the film
June 1, 2003 in Los Angeles. Willis met Stell yesterday and invited her
to attend the premiere. REUTERS/Jim Ruymen
Actor Bruce Willis and Italian actress Monica Bellucci, stars of the
new drama film "Tears of the Sun," pose at the film's premiere in Los
Angeles, March 3, 2003. The film opens March 7 in the United States.
Actors Bruce Willis (L), who plays David Dunn, and Samuel L. Jackson, who plays Elijah Price, arrive at the premier of Touchstone Pictures' "Unbreakable" at the Ziegfield Theatre in New York City, November 14, 2000. The movie is scheduled to be released nationwide on November 22.
Film stars Demi Moore and Bruce Willis, shown in a August 6, 1997 file photo at a premiere in Los Angeles, have officially ended their 13-year marriage, according to the television show "Access Hollywood." The syndicated program reported October 25, 2000 that the couple's divorce became official a week ago.
American actor Bruce Willis (L) kisses his wife Demi Moore (R) at the opening of one of their new hamburger-restaurants, May 8. Willis attends the 50th Cannes Film Festival where he stars in French director Luc-Besson's "Le Cinquieme Element" which was screened yesterday at the opening of the festival.
US actor Bruce Willis (R) points alongside Ukrainian actress Milla Jovovich (L) during a photo call for French director Luc Besson's film "Le Cinquieme Element", May 7. Besson's film, which is screened out of competition, opens the 50th Cannes Film Festival on the French Riviera.
U.S. actor Bruce Willis (L) arrives with his wife Demi Moore (2nd L) under the watchful eyes of a body guard for the screening of French director Luc-Besson's "Le Cinquieme Element" at the opening of the 50th Cannes Film Festival, May 7. Willis stars in the futuristic film that is screened out of competition.
American movie star Bruce Willis answers a television journalist's questions as he arrives at the opening of Bangkok's Planet Hollywood restaurant January 24. Hundreds of star-struck fans waited just off one of the most congested streets of the city for more than four hours to catch a glimpse of their favourite movie stars.
US actor Bruce Willis performs live on stage with a cartoon character during the opening ceremony of Eurodisney's Planet Hollywood Cafe near Paris November 16. It was the Grand Opening of the 38th Planet Hollywood restaurant.
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It's said that after being challenged, Willis left the shop without buying anything.
"It was an error in judgment," the Die Hard actor said in a statement released to People.
"Be safe out there everyone and let's continue to mask up."
Los Angeles County has become one of the worst affected coronavirus hotspots in the US, with approaching 1 million cases and more than 12,600 deaths to date.
Willis, who usually lives in Los Angeles with his wife Emma Heming and their two young children, spent his lockdown with ex-wife Demi Moore and their children Scout, Rumer and Tallulah at the family's home in Idaho after getting stranded there when travel restrictions began to take hold.