DrakeO Stabbed and Killed at Once Upon A Time Festival

Darrell Caldwell, 28, was set to perform at the Once Upon a Time in LA festival on Saturday night.

His publicist told many US media sites he died Sunday morning.

The performer was stabbed backstage around the time of his performance.

Police in Los Angeles said no arrests had been made as of Sunday morning.

Drakeo the Ruler collaborated with Canadian rapper Drake on the song Talk to Me.