3 dead after high school shooting in New Mexico, authorities say

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Aztec High School in Aztec, New Mexico.

• Three people are dead after a New Mexico high school shooting, authorities say.
• It's unclear if the shooter is among the dead.

Three people believed to be high school students are dead following a shooting at a high school in Aztec, New Mexico, San Juan County Sheriff Ken Christesen told media Thursday.

The shooter is "down," Aztec Mayor Sally Burbridge told CNN, but Christesen told the Albuquerque Journal that it's unclear whether the shooter is among the dead.

The sheriff's department said in a Facebook post that morning that Aztec High School was being locked down and evacuated. Aztec is located in northwest New Mexico.

This is a developing story. Refresh for updates.