WATCH: Brawl breaks out at Toronto concert hall

Toronto Police tell NEWSTALK 1010 that a person who was at last night's chaotic concert at the Danforth Music Hall later showed up to hospital with critical stab wounds.

Investigators are trying to determine where the man was attacked. They are not sure if it happened inside the venue during the melee or outside the building after the incident.

At least a handful of others were hurt, but police think there are some who were injured that didn't get help from paramedics.

Video shows people from the crowd rushing the stage at a Pusha T concert, reportedly when he began to perform a diss track targeting Toronto rapper Drake.

The 41 year-old American has been involved with a high profile and long running feud with Drake that came to a head in the summer.

Pusha T accused Drake of using a ghostwriter and revealed that he father a child.

After the concert resumed last night, the artist accused Drake of paying people to go after him.

Police are investigating but no charges have been laid.

NEWSTALK 1010 asked officers if they would talk to Drake and we were told police will follow the evidence wherever it leads.