Jake Gyllenhaal -- Gang Violence Witness

7/14/2011 5:45 AM PDT BY TMZ STAFF
Jake Gyllenhaal and Michael Pena witnessed the aftermath of gang violence Wednesday night, as they rode with cops who responded to a bloody gang shooting in South L.A. 

The two actors, who were prepping for their roles in a new movie, watched as paramedics treated an alleged gang member, who suffered grazing bullet wounds on the lip and arm.