A 24-year-old man is believed to have killed his girlfriend and her mother, then fatally shot himself after a SWAT standoff at a far northeast Dallas apartment complex Sunday, police said.

Officers responded about 4:30 p.m. Sunday to a report of an active shooter at the apartment in the 9800 block of Summerwood Circle. As they approached the building, someone fired at them, shattering a window of a squad car.

The officers took cover and called for a SWAT team. Police did not discharge their weapons and no officers were injured, police said.

SWAT officers set up a perimeter and made several attempts to get the gunman to surrender, police said. They entered the apartment about 7 p.m. and found three people dead.

Police identified them Monday as Tamiko Merriwether, 55, her daughter Marietta Matthews, 26, and Nathan Rashad James, 24. Matthews was in a relationship with James and lived with him at the apartment, police said.

Police said the women died from gunshot wounds and James died from what appeared to be a self-inflicted gunshot wound.

The police department’s special investigations unit will conduct a follow-up investigation, police said.

Police Chief Eddie García said on Twitter that he was praying for the victims and that he was inspired by his officers’ bravery in responding to the incident.

Livestream video below showing the suspect with his mother and gf's dead body: