Two men are facing criminal charges after a hostile crowd fought with Chicago police officers who were responding to a mass shooting Tuesday afternoon in the Back of the Yards neighborhood.

Police have said five people were standing outside near an intersection around 4:30 p.m. Tuesday, when a stolen red Mazda pulled up, and an unspecified number of people got out, pulled out guns, and shot them all, CBS Chicago reports.

Chicago Police Supt. David Brown said the shooting was the result of an ongoing gang conflict in the area. Gang members in the Mazda spotted members of a rival gang on the street, and the two groups started exchanging gunfire.

A 19-year-old man was killed. Four other males were wounded.

At the scene, officers immediately began performing lifesaving measures on the victims when two men from a hostile crowd came up and began fighting with the officers, police said.