ALISSA RUBIN

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.

The day after a deadly assault in Syria that bore many of the hallmarks of a chemical weapons attack, a sharply divided Obama administration began weighing potential military responses Thursday to President Bashar Assad's forces.