A teen is in critical condition after a party ended in mysterious gunfire.

Police say someone gunned the teenager down outside a bar where a private party took place.

It happened around 1 a.m. Sunday in the 100 block of N. W.W. White at Jacalitos Pub.

According to police, the teen went outside and someone opened fire on him from a vacant lot next door.

Two bullets hit the victim, but he managed to stumble back into the bar before collapsing.

EMS transported him to SAMMC in critical condition.

Police found 20 to 30 shell casings at the scene and believe the shooting was gang related.