An abandoned building occupied by squatters in Sao Paulo caught fire and collapsed on Tuesday. Firefighters said at least one person had been killed and that there could be more casualties. The building, a former headquarters of the federal police, caught fire around 1:30 a.m. local time. Firefighters set up a perimeter and worked to evacuate people. The 26-story building collapsed a few hours after the fire fully engulfed the building.