Charlie Kirk, a 31-year-old conservative activist and media personality, was killed by a gunshot in the neck while speaking at an event at Utah Valley University on Wednesday. The event was being held at an outdoor stage, where at least 1,000 people had gathered to hear Mr. Kirk speak.

When and where did the shooting take place?

According to the university, Mr. Kirk was shot at about 12:10 p.m. local time, about 20 minutes after he began speaking on campus, about 40 miles south of Salt Lake City.

The event was the first of a 15-stop itinerary on what was called the American Comeback Tour, which had planned appearances at college campuses across the country.

Where was Mr. Kirk?

Mr. Kirk was sitting beneath a white tent emblazoned with “American Comeback,” in an outdoor amphitheater space on campus.

Seconds before he was shot, he was asked a question about mass shootings in America.

Where was the shooter?

A spokeswoman for the university said the shooter fired at Mr. Kirk from the Losee Center, a building about 200 yards away.

The gunman is not yet in custody. The school originally said that the shooter had been taken into custody, but police determined that the person they had detained was not the gunman.

What happened after?

Videos showed people fleeing from the event. Immediately after news of the shooting broke, statements expressing shock and horror began to pour in on social media from prominent figures on both the right and the left.

Search activity is ongoing at the university and officials said that four agencies were actively investigating the shooting.