GILROY, Calif. —

Police and emergency personnel late Sunday responded to reports of a shooting involving multiple victims at the Gilroy Garlic Festival in Gilroy, California.

Ambulance crews were told 11 people were down in an active shooter incident at Gilroy's Christmas Hill Park. As of 6:30 p.m. the situation was still active, according to Gilroy police.

Officials with Santa Clara Valley Medical Center said they were expecting two major trauma victims from St. Louise Hospital in Gilroy.

One witness told NBC Bay Area he was on his way out when felt a bullet pass by his head, and when he turned around, he saw everyone running. 

No further details were immediately available.

A festival attendee posted a video to Twitter. In the video, gunshots could be heard and people are seen running. 

WARNING: Video contains strong language.