A heavy police presence moved into East Los Angeles College Tuesday night.
Around 6:15 p.m., the Los Angeles County Sheriff's Department received two phone calls about a man running through the campus with a gun, authorities said.
Deputies arrived and searched the area, and after several sweeps said there was no gunman.
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LASD said there was no lockdown on campus.
The school is located at 1301 Avenida Cesar Chavez in Monterey Park.
Students tweeted that there was a heavy police presence on campus around 7 p.m.
NewsChopper4 was overhead, showing patrol units parked in front of the school.
A student named Christian Absi called NBC4 saying classes were canceled Tuesday night.
Deputies were told to remain on high-visibility patrol.