1 shot during Heritage Day festival in Easton, Pennsylvania

EASTON, Pennsylvania (WPVI) -- The annual Heritage Day celebration in Easton, Northampton County turned chaotic when gunfire erupted in the crowd on Sunday.

The shooting happened in the 200 block of Northampton Street at about 9:45 p.m.

Police believe the shooter was high school-aged.

The shooting victim and those around him refused to cooperate with investigators, police said.

They believe the victim and the shooter were part of a larger group involved in a disturbance several blocks away before the gunfire began.

Police are asking anyone with video from the scene to contact them.