(Reuters) – A suspected shooter opened fire at a high school in New Mexico on Thursday, killing two students before being killed, according to police and officials from the nearby Navajo Nation.

Few other details were immediately available about the incident at Aztec High School in the city of Aztec, about 200 miles (322 km) northwest of Santa Fe, including whether the shooter was a student or if the shooter was killed by police.

The New Mexico State Police said no other injuries were reported, that the school was evacuated, and families of the victims were notified. Police said there were no other credible threats to students.

Garrett Parker, a sophomore at Aztec High School, told Hearst news affiliate KOAT, that he initially thought the gunshots were other kids banging on locker doors.

“As it got closer and louder and it was obvious it was gunshots. All I could think of was that definitely, this is it today, if whoever it is comes in then I’m probably done,” Parker said. “Thankfully our teacher always locked his door. When they called over the intercom that this was not a drill, we went over to the corner to the classroom out of sight of the door and just started hiding.”

Navajo Nation President Russell Begaye said in a statement that all schools in the area were placed on preventative lockdown as a precaution.

“It’s tragic when our children are harmed in violent ways especially on school campuses,” Begaye said in the statement.

(Reporting by Gina Cherelus in New York; Additional reporting by Andrew Hay in New Mexico; Editing by Daniel Wallis and Andrew Hay)