Firefighters found smoke from a fourth-floor apartment and a sprinkler system activated at a high-rise complex at 901 F St. around 12:30 a.m., according to San Diego Fire & Rescue.
Crews of 45 personnel knocked down the flames by 1 a.m. and closed their incident by 1:49 a.m.
SDFD did not report any displacements due to the fire.
