AURELIEN BREEDEN

Salah Abdeslam, a crucial suspect in the November Paris attacks who is thought to be the only direct participant to have survived, was handed over to France by Belgium on Wednesday.

Belgian authorities released video footage Thursday that retraced the steps of a man suspected of taking part in the March 22 bombing of the Brussels Airport and renewed their appeal to the public for help in identifying him.

One of two men who blew themselves up at Brussels Airport on Tuesday was a bomb maker who had helped produce two suicide vests used in the attacks that killed 130 people in and around Paris on Nov. 13, Belgian authorities said Friday.

The attacks in Brussels Tuesday were carried out by two brothers who detonated suicide bombs, Belgian officials said, as police continued an intense hunt for at least one other participant in the attacks. The toll from the assaults stood at 31 dead and 270 injured.

Bombs packed with nails terrorized Brussels on Tuesday in the deadliest assault on the European heartland since the Islamic State’s attacks on Paris four months ago, hitting the airport and subway system in coordinated strikes that were also claimed by the militant extremist group.

Europe’s most wanted man, Salah Abdeslam, believed to be the 10th participant in the Paris terrorist attacks of Nov. 13, was captured Friday during a police raid in Brussels.

Belgian investigators searching a Brussels apartment have found the fingerprint of a fugitive wanted in connection with the Paris terrorist attacks, as well as material that might have been used to assemble suicide belts and traces of an explosive used in the assaults, officials announced Friday.

The day of further violence left Paris on edge once again and much of the world transfixed as the manhunt for Abaaoud and his accomplices played out. Evening brought only uncertainty about whether the threat had been eradicated or whether Abaaoud, who has boasted of eluding capture, remained at large.

A dragnet across Europe widened on Tuesday to include a second fugitive suspected to have taken part in the Paris terrorist attacks, as officials tried to make sense of a torrent of emerging intelligence about the planning and execution of the attacks.

The Belgian man suspected of plotting the Paris terrorist attacks was a target of Western airstrikes on the Islamic State stronghold of Raqqa, Syria, as recently as last month, according to a European security official.

The hunt for those responsible for the Paris terrorist attacks escalated on Monday as French officials identified a 27-year-old Belgian who fought for the Islamic State in Syria as the chief architect of the assaults and the police in France and Belgium conducted extensive raids seeking other suspects.

Three teams of Islamic State attackers acting in unison carried out the terrorist assault in Paris on Friday night, officials said Saturday, including one assailant who may have traveled to Europe on a Syrian passport along with the flow of migrants.