What We Know About the Assassination Attempt Against Trump

A man fired “multiple shots” toward the stage during former President Donald J. Trump’s rally in Butler, Pa., on Saturday evening, killing one spectator and critically injuring two others, according to the Secret Service.

Mr. Trump was rushed off the stage, blood visible around his right ear, and was pronounced fine. The Secret Service said its agents had killed the shooter, whom federal law enforcement officials identified as Thomas Matthew Crooks, a 20-year-old from Bethel Park, Pa.

The attorney general’s office and the F.B.I. are investigating the shooting as a possible domestic terrorism attack and assassination attempt.

Here’s what we know about the shooting.