Brussels bomb suspect Najim Laachraoui has been arrested, according to local media reports in Belgium.
Laachraoui, who was reportedly detained in the Brussels suburb of Anderlecht, is believed to have accompanied brothers Brahim and Khalid El Bakraoui to the city's airport yesterday, where they blew themselves up, killing 14 people.
Newspaper La Derniere Heure reported: "The third man in the images taken at Brussels airport was arrested this morning by the DSU (Belgian Federal Police's Counter Terrorism and Swat Unit), according to our sources.
"The federal prosecutor has not confirmed this information."
Bomb-maker Laachraoui is also suspected of having played a "decisive role" in the Paris terror attacks, French media has reported.
He was an accomplice of Paris terror suspect Salah Adbeslam, who was arrested in Brussels on Friday.