Excerpt:

Alameda firefighters are treating as suspicious a fire that broke out Sunday at a vacant barracks at the former Alameda Naval Air Station.

No one was injured during the fire in the 1000 block of West Midway Avenue, where a passer-by reported dark smoke coming from a window at 6:08 p.m., Alameda fire Capt. Jim Colburn said.

Firefighters declared the blaze, which was on the second floor of the two-story building, extinguished about 45 minutes later.