Donald Trump has hailed the response by New York's firefighters after a blaze broke out in an apartment at his Manhattan skyscraper.
Flames and smoke were seen issuing from windows on the 50th floor of Trump Tower, where the president has a residence, on Fifth Avenue on Saturday evening.
The New York City Fire Department (FDNY) said it had received a report that a civilian had been seriously injured in the incident.
The FDNY said the blaze broke out shortly before 6pm on Friday before flames and black smoke were seen rising from one corner of the 58-storey tower.
Around 45 minutes later, Mr Trump took to Twitter to praise firefighters for their response, saying they had extinguished the blaze.
The billionaire, who made his fortune in property, also attributed the design of his eponymous tower to the fire's limited spread.
"Fire at Trump Tower is out. Very confined (well built building). Firemen (and women) did a great job. THANK YOU!" he wrote on Twitter.
The FDNY said crews remained at the scene, adding: "There is currently one serious injury to a civilian reported."
Mr Trump was reportedly in Washington DC during the incident. As well as his luxury residence, Trump Tower also contains offices of the Trump family business.
His son, Eric Trump, tweeted: "Thank you to the amazing men and women of the NYFD who extinguished a fire in a residential apartment at @TrumpTower. The @FDNY and @NYPD are truly some of the most incredible people anywhere!"