Authorities say three people were stabbed during a melee involving groups of teenagers at a fair in a suburban Philadelphia church parking lot.

Police in Tullytown shut down the Saint Michael's Fair early Thursday night and took four people into custody following several fights involving what police called a "large unruly group of teenagers."

Authorities didn't immediately identify those who were taken into custody. It's unclear what the conditions of the victims are.

The Bucks County Courier Times reports the St. Michael's Fair is scheduled to run through July 10 in the parking lot of the Catholic church.