4 Dead, 4 Wounded in Dallas-Area Shooting

Suspect arrested at the scene

Police were trying to determine Thursday what prompted fatal shootings in two Dallas-area homes that left four dead and another four wounded.

Investigators arrested a suspect, Erbie Bowser, 44, at the scene of the second shooting, which took place late Wednesday.

Police say the shootings began around 10:30 p.m. Wednesday at a Dallas home, where two people were killed and two others were injured, according to the Dallas Morning News. Two more people were killed and two children were wounded at a second home in DeSoto, where police said a hand grenade was thrown into the living room before the shooting began, the Morning News reported.