Five people, including three children, were fatally shot -- allegedly by a 15-year-old boy -- outside Albuquerque, N.M., on Saturday night. Police are still investigating the case.

The teenage suspect, who has not been identified by law-enforcement authorities, apparently shot the victims at a home in a rural area about 10 miles southwest of downtown Albuquerque, the Associated Press reported.

The suspect’s connection to the victims and motive are unknown at the moment.

One of the victims is Greg Griego, who the AP described as an Albuquerque Fire Department chaplain who also worked with jail inmates. None of the other four victims has been identified.

Bernalillo County Sheriff Dan Houston said the suspect "may be a family member," CNN reported.

The suspect has been taken into custody and faces two counts of murder and three of child abuse resulting in death. Authorities said they were unaware of any criminal history with respect to the suspect.

Police were sent to the scene around 9:15 p.m. local time on Saturday. According to Houston, the police received news of the shooting via "a party that was called by the suspect," although he noted, "I don't know what the dynamics of that relationship is."

"Initially responding deputies entered the home and found the five deceased inside the residence, so obviously it was a very gruesome scene," CNN quoted county Sheriff's Lt. Sid Covington as saying.

“I’ve never seen a scene quite like this,” Covington said.

The AP reported several firearms were found in the house, including a semiautomatic military-style rifle. Investigators have not yet determined whether the weapons belonged to the suspect or the victims.