4-alarm fire burned old military barracks on Mare Island in Vallejo

VALLEJO, Calif. -- A four-alarm fire broke out in old military barracks on Mare Island in Vallejo Sunday night.

Firefighters responded to a report of a structure fire in the 400 block of Azuar Drive shortly after 7 p.m., fire Capt. Steve Smircich said.

The fire was burning in abandoned military barracks near North Gate, fire officials said.

The barracks are known to house "homeless activity," Smircich said.

As of about 9:15 p.m., no injuries were reported, he said.

Crews from the Fairfield Fire Department are also assisting in battling the fire.

As of 8:30 p.m., crews had the fire under control.

No further details were immediately available.

ABC7 News contributed to this story.