Chicago police officials held another press conference Wednesday afternoon to showcase how they’re getting tough with dealers and gangs since declaring a “ground war” in March—in this case, ten more guys, ranging in age from 18 to 69, were caught possessing or selling small amounts of heroin on the west side.

The police said it was the result of an investigation involving city, county, state, and federal authorities. “The joint efforts of law enforcement partners in this mission have afforded an opportunity for increased safety to thrive in our communities,” Al Wysinger, Chicago’s first deputy police superintendent, said in a written statement.