Two dead in shooting at San Bernardino elementary school, police say

iStock/Thinkstock(SAN BERNARDINO, Calif.) -- Two adults are dead after a school shooting at a San Bernardino, California, elementary school, according to police.

The deceased were found in a classroom at North Park Elementary School, San Bernardino Police Chief Jarrod Burguan wrote on Twitter. The shooting appears to be a murder-suicide, Burguan added.

Two students are in critical condition and were taken to local hospitals for treatment, according to police in San Bernardino.

The suspected shooter is believed to be "down" and there is no further threat at this time, according to Burguan.

The school is currently on lockdown, and other area schools have been placed on precautionary lockdown, San Bernardino City Schools Communications Officer Maria Garcia told ABC News. Students at the school are be taking to Cajon High School for safety, Burguan added.

Helicopter footage from ABC Los Angeles station KABC-TV shows students gathered near an exterior fence on campus. The footage also shows law enforcement canvassing the campus parking lot.

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