Heroic fans who tackled one of the Kansas City Chiefs parade shooters have described holding him down and snatching his rifle after it fell onto the ground. 

Three people are in custody in connection with the incident that sparked panic among the crowds yesterday after the Chiefs celebrated their win, including the young man tackled as he attempted to flee the scene. 

Shots rang out moments after Travis Kelce and Patrick Mahomes left the stage next to Union Station, hundreds of thousands had gathered to party. 

What exactly led to the shooting remains unclear. Police last night said it was not 'targeted', but are yet to explain why the shooter was carrying a rifle. None of the suspects have been named.