A Victorian possibly occupied by squatters erupted into a 3-alarm fire late Tuesday night that left the building gutted and two nearby residences slightly damage, Oakland fire officials said. Oakland Fire Battalion Chief James Bowron said crews responded to 911 calls of a fire in a vacant 3-story Victorian in the 800 block of 20th St. at around 9 p.m. “Crews arrived on scene to find this 3-story Victorian with heavy fire on the first and second floor with exposure to houses,” he said. Firefighters quickly elevated the response to three alarms in the densely populated neighborhood. The Victorian was heavily involved that personnel inside the burning building were pulled out.