A passenger aboard a Las Vegas-bound flight fashioned a weapon out of pens and rubber bands and stabbed a fellow passenger in a bloody, unprovoked attack, officials said Thursday.

Julio Alvarez Lopez was charged with one count of assault with a deadly weapon stemming from the Jan. 24 attack aboard Alaska Airlines Flight 604, which had left Seattle at 6:10 a.m., authorities said. ...

Lopez had been acting “fidgety,” a person sitting next to him told investigators, before he went to the bathroom late in the flight and returned to launch an attack on the man seated across the aisle, according to a complaint by FBI Special Agent Anthony Needler.