Update | Five linked to Brussels bombings arrested, including attacker in Paris terror onslaught

The arrest Friday of five men suspected of links to the Brussels bombings, including the last known fugitive in last year’s Paris attacks, raised new questions about the extent of the Islamic State cell believed to have carried out the intertwined attacks that left 162 people dead in two countries.

After weeks of speculation about a mysterious “man in the hat” who escaped the Brussels attacks while three suicide bombers blew themselves up, authorities were checking whether that man was indeed Mohamed Abrini, the last identified suspect at large from the Paris attacks until Friday. Another man arrested in a series of raids, identified as Osama K. by Belgian authorities, was linked to the November 13 Paris attacks by French authorities on March 22, hours after the Belgium attacks.

Abrini and Osama K. are now suspected of playing a role in the two biggest attacks carried out by the Islamic State group in Europe over the past year, killing 130 people in Paris and 32 in Brussels. French authorities renewed their call to arrest an armed and dangerous Abrini within hours of the Brussels attacks.

“We are investigating if Abrini can be positively identified as the third person present during the attacks in Brussels National Airport, the so called ‘man in the hat,’” said prosecutor Eric Van der Sypt.

The man walked away from the airport attack, where two suicide bombers blew themselves up, killing 16. Authorities detained four other men on Friday, including Osama K., suspected of having contact with the suicide bomber who blew himself up in the Brussels subway the same morning, killing another 16.

Osama K. was filmed by security cameras in the City 2 shopping mall when the bags were bought that were used by the suicide bombers who attacked the airport.