A dispute led to a man arming himself with a shotgun and killing two men inside a Studio City home before turning the gun on himself Friday night, April 17, authorities said.

Los Angeles officers received a call of a screaming man and shots fired and responded to a home in the 11000 block of Aqua Vista Street about 11:05 p.m., where they found three men dead from gunshot wounds, police said.

What the dispute was about was unknown, but investigators believe 47-year-old Phana Subpramoon grabbed a shotgun and shot 67-year-old Joseph Marcotte and 69-year-old Jaturong Siriprasirt multiple times in their bedroom before walking into the living room and shooting himself, police said.

Subpramoon and Siriprasirt were related, police said, but the nature of their relationship was not disclosed by police.

The motive behind the shooting was still under investigation. Anyone with information about the incident was asked to call Detective Steve Castro at 818-374-1925. Anonymous tips can be submitted by calling L.A. County Crime Stoppers at 1-800-222-TIPS (8477).