Students and staff at the Riverside City College campus were told to shelter in place on Tuesday due to a clash between police and a knife-wielding man.

The campus was closed after witnesses reported a man armed with some type of weapon. Riverside police and sheriff’s deputies responded to the initial report.

Authorities found the man in a nearby waterway or tunnel off campus, according to Riverside Police. The man ran onto campus and then barricaded himself somewhere on the property, according to Riverside City College police.

Police activity is near the soccer field, the school said.

No injuries were reported. There have been no reports of threats against anyone on campus in the 4800 block of Magnolia Avenue.

“There has been an incident at Riverside City College, please stay put,” the school said in a tweet.

Located in downtown Riverside, the university serves approximately 30,000 students annually on its 108-acre campus.

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