Authorities say a shooting at a high school in a small New Mexico town left two students and the suspect dead.
As the noise got louder and closer, school officials issued a warning over the loud speaker.
"Right now everybody is on lockdown", a statement from Bloomfield Police Department says.
The families of the victims have been notified and none of the dead have yet been identified, the Farmington Daily Times reported.
Other schools in the area were also locked down.
Aztec police chief Mike Heal told reporters that the suspect was down, without clarifying if "down" meant injured, dead or in police custody. The investigation is now being led by the New Mexico State Police, with support from the FBI.
Aztec is a rural community of 6,500 people in the heart of northwestern New Mexico's oil and gas country and near the Navajo Nation. That was confirmed shortly after by San Juan County Sheriff Ken Christesen.