LINCOLN, Neb. (AP) — Lincoln police say a 22-year-old suspect in a gang-related shooting is dead.

Police say Musito Hector Antonio Lopez died Sunday of an apparent gunshot wound to the head. Lopez is suspected of shooting 20-year-old Erick P. Musito early Sunday after an argument.

Authorities say the men were rival gang members. They had befriended two sisters who lived together in an apartment where Musito was shot, about two blocks from the Nebraska Capitol.

Lincoln Police Chief Jim Peschong says Lopez was found dead in his mother’s mobile home about 6 p.m. Sunday after a SWAT team surrounded her home.

Peschong says Lopez fired several shots from the home. Authorities pumped gas into the trailer, but couldn’t force him out. They got a camera into the home and saw Lopez dead.