STOCKTON — The Stockton Fire Department is investigating what started a blaze at an abandoned apartment building near downtown late Friday afternoon.Fire crews responded to the two-alarm call about 4:50 p.m., and found the building, located on the northeast corner of Hunter and Park streets, fully engulfed in flame.Five engines and two ladder trucks responded to the call, and crews had the fire under control in about 30 minutes.Battalion Chief John Titus said [...]