The Brief

IMPERIAL COUNTY, Calif. - A homicide investigation is underway after a California prison inmate was allegedly attacked and killed by two other inmates, according to the California Department of Corrections and Rehabilitation.

What we know:

The incident happened on Nov. 10 at around 10:20 a.m. in the exercise yard at Calipatria State Prison.

According to officials, 31-year-old Alex Mercado was attacked by 26-year-old Eric Gonzalez and 27-year-old Javier Torres.

Staff used chemical agents to stop the attack and immediately restrained Gonzalez and Torres.

Mercado was taken to a hospital where he later died.

Officers recovered one improvised weapon at the scene.

No staff or other inmates were injured during the incident.

What we don't know:

Officials did not disclose wh

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