Two students were killed after gunfire erupted early Thursday at a New Mexico high school, according to police.

The San Juan County Sheriff’s Office said the person believed to have opened fire at Aztec High, a school of about 1,000 students near the Colorado border, is also dead. No one else was injured, the sheriff’s office said. The Navajo Nation Office of the President and Vice President, which oversees territory not far from the school, had previously released a statement saying 15 people were injured.

The FBI and New Mexico state police were investigating.

Officials held an afternoon press conference but released little information about what transpired at the school Thursday morning, including the names of those killed and how the suspected shooter died.

New Mexico Gov. Susana Martinez commended police for their courage and described students “hiding in closets, in teacher’s offices and under desks.”

“There were several acts of bravery by staff members, teachers and students that were amazing, that actually saved lives,” said Martinez, who added that the White House had called, offering its condolences.

Police are working to establish why a student opened fire at Aztec High School in New Mexico on Dec. 7, killing two of his classmates. (Reuters)

As authorities continued to piece together what unfolded at the high school, Martinez said the state education department would send $120,000 to the high school to pay for counselors, social workers and extra security in the wake of the violence.

Aztec Municipal School Superintendent Kirk M. Carpenter said students and staff had prepared for a day like this and responded appropriately.

“We obviously do drills and hope that nothing ever happens,” Carpenter said. “Our staff and even our substitutes reacted in a way that saved a lot of lives.”

Police shuttled students away from the school and to a nearby park, where they were to be reunited with their families.

“The school has been evacuated and all students are to be picked up at McGee Park at noon,” the sheriff’s office said. “Our priority right now is to reunite students with their families.”

Update on shooting at Aztec High School: This is a unified investigation, we have the FBI and State Police Crime Scene...

Posted by San Juan County Sheriff's Office, NM on Thursday, December 7, 2017

The San Juan County Sheriff’s Office told KRQE-TV deputies were working to evacuate students to safety and were searching the school buildings.

Aztec High School is locked down and being evacuated. Please avoid the area. Parents can stage at 516 and Mesa Verde near the church to pick up their kids. We will update this as we learn more.

Posted by San Juan County Sheriff's Office, NM on Thursday, December 7, 2017

The shooting took place a week before the fifth anniversary of the massacre at Sandy Hook Elementary School in Newtown, Conn., the deadliest school shooting in U.S. history. On Dec. 14, 2012, a man opened fire at Sandy Hook, killing 20 children and six staff members.

In the small community of Aztec, worried parents rushed to city hall to meet their children.

The police department in nearby Bloomfield locked down school buildings as a precaution, according to the department’s Facebook page.

We are aware that there was a shooting at Aztec High School. We do have officers located at all of the schools in...

Posted by Bloomfield Police Department - New Mexico on Thursday, December 7, 2017