TORONTO (AP) — One person has life-threatening injuries after a stabbing at a Pusha T concert in Toronto.

Toronto Police Constable David Hopkinson said Wednesday three others were treated at a hospital for minor injuries at the Danforth Music Hall late Tuesday. Hopkinson said the patient who was stabbed remains in critical condition.

Video on social media shows drinks being hurled onstage toward Pusha T and fights breaking out as some people charge the stage.

Hopkinson said someone rushed the stage and several people were injured in resulting melees, but it's unclear whether the stabbing victim was wounded inside or outside the venue. Police didn't find out someone was stabbed until they noticed someone with serious stab wounds at a local hospital.

Pusha T and Toronto rapper Drake have had a long running feud and have released diss tracks including one from Pusha T that divulged that Drake had a son.

A representative for Drake declined to comment on the concert brawl. A representative of Pusha T didn't immediately respond to a message seeking comment.

Pusha T returned to the stage after the melee and said people were hired to throw beer at him. One of his security guards brandished a two by four as he performed again.

"The investigators would be aware of whatever the feud is," Hopkinson said.