Authorities are investigating what appeared to be a domestic-related shooting Thursday afternoon at a Maryland high school. Two people were shot, one fatally at High Point high school in Beltsville. (WUSA9)

A woman was killed by her estranged husband and a male bystander wounded in a shooting Thursday in the parking lot of High Point High School in Beltsville, Md., in a domestic incident, police said.

The male assailant remained at large Thursday evening after the shooting, which occurred about 4:40 p.m. as the woman was picking up her children from school, said Prince George’s County Police Chief Henry P. Stawinski III.

Police identified the suspected shooter as Eulalio Tordil, 62, and the woman who was fatally wounded as Gladys Tordil, 44. Eulalio Tordil, of the 1800 block of Metzerott Road in Adelphi, is an employee of the Federal Protective Service, police said.

Police allege that Tordil followed his wife into the school lot and got out of his car to confront her as she sat in her SUV. A male bystander seeing the confrontation moved to intervene, but as he approached, the shooter fired several times at him, police said. The bystander, who has not been identified by police, suffered a shoulder injury that appeared not to be life-threatening, the police chief said during a news conference.

Police said Tordil then fired an unknown number of shots and hit his estranged wife, killing her. He fled the scene in a vehicle.

“At no point was this an active shooter inside the school,” Stawinski said.

He said police had not recovered a weapon. Police did not immediately release information about what prompted the shooting.

The incident was captured by school surveillance cameras and was witnessed by adults and possibly students at the school, Stawinski said.

Kevin Maxwell, chief executive of the Prince George’s school system, said at the news conference that classes had been over for about two hours when the shooting occurred, but some students and teachers remained inside as a precaution and were later permitted to leave the building. No students were harmed, schools officials said.

Mark Brady, the Prince George’s Fire Department spokesman, said in a voice-mail message that the woman was pronounced dead at the scene.

Sherrie Johnson, Prince George’s schools spokeswoman, said that dismissal at High Point was at 2:25 p.m. but that some students stayed later for after-school programs.

Shortly after the gunfire, a crowd gathered across the street from the high school. Among those gathering were people worried about friends and relatives who still were in the school.

Police named Eulalio Tordil, 62, in connection with the shooting death of his estranged wife in a school parking lot in Beltsville on May 5, 2016. (Prince George's County Police Department)

Chris Barber, a 2007 graduate of High Point, lives in the area and rushed over when he heard news of the shooting.

“I came to check on my friend’s little brother,” Barber said. “I wanted to make sure he was safe.”

Word that the victims were adults and not students was not a relief. “Regardless of who it is someone was shot and killed,” Barber said.

Police were asking anyone who knows the whereabouts of Eulalio Tordil to call 911.

Hamil R. Harris contributed to this report.