Orem, Sept. 11 -- Conservative influencer and President Donald Trump's ally, Charlie Kirk, was shot dead at a college campus here in Utah on Wednesday.

A single shot was allegedly fired by an unidentified person at 12:20 pm local time as Kirk was taking a question from a student, critically wounding him in neck, reports BBC.

Video shows him immediately collapse. No one else was shot during the event.

He was rushed in "critical condition" to a local hospital and "it doesn't look good", his colleague told CBS News, BBC's US partner.

The university said one shot was fired from about 200 yards away (182m), on the opposite side of the quad where he was speaking, and the campus has been closed for the day.

Kirk's wife Erika and their two chi...