Homicide detectives were investigating the fatal shootings of three people and a related fire in Antelope Valley early Saturday morning.

Emergency crews called to Tabler Avenue in Lancaster at 1:27 a.m. found a one-story house on fire, according to Los Angeles County Sheriff and fire departments.

Three men and a woman in her 20s inside the home had gunshot wounds, authorities said. Two of the victims were pronounced dead. Deputies pulled two others from the burning building and performed CPR outside. One died at the scene and the other, a man, was taken to hospital in critical condition, according to firefighters.

Firefighters extinguished the fire shortly after 2am

“We don’t have a reason for the fire. It’s under investigation,” LA County Fire Chief Robert Grasska said.

Investigators remained at the scene through sunrise and provided some additional details.

The sheriff’s department asked anyone with information to contact the homicide bureau at (323) 890-5500.