Investigators believe a Saucier man fatally shot his two stepdaughters and one of their boyfriends before turning the gun on himself on Andre Drive home early this morning.
The man's wife escaped through a window of the mobile home, Harrison County sheriff's officials said.
The three killed are 17- and 19-year-old females, a 19-year-old male and the unidentified man.
A 911 dispatcher received the call of a domestic dispute at 3:22 a.m.
The Sun Herald is on the scene and will give details as they emerge.