Police are responding to a shooting at a July Fourth parade in a Chicago suburb, authorities said Monday. Authorities have not officially reported any casualties, but witnesses described seeing bloodied bodies apparently covered with blankets.

The Chicago Sun-Times reported that the parade began around 10 a.m. but was suddenly halted 10 minutes later after shots were fired. Several witnesses told the newspaper that they heard gunfire.

Hundreds of parade-goers — some visibly bloodied — fled the parade route, leaving behind chairs, baby strollers and blankets.

A Sun-Times reporter saw blankets placed over three bloodied bodies.... Read More: Associated Press