Lilia Blaise

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 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.