India, Sept. 11 -- Charlie Kirk, a key Donald Trump ally who helped rally young voters to Republican causes, died on Thursday after being shot in the neck during an event in Utah, United States.

Kirk, executive director of the conservative Turning Point USA advocacy group, was speaking at an outdoor event at Utah Valley University when an unidentified shooter attacked him.

Follow for live updates on the Charlie Kirk shooting.

"The Great, and even Legendary, Charlie Kirk, is dead. No one understood or had the Heart of the Youth in the United States of America better than Charlie," Trump said on Truth Social. He ordered American flags to be lowered to half-staff until Sunday evening.

A manhunt was underway for Kirk's shooter. A person o...