San Francisco crews contained a three-alarm fire that tore through an apartment building in the city’s Tenderloin neighborhood early Friday morning and displaced dozens of residents, according to fire officials. Shortly after 3 a.m., crews responded to 50 Golden Gate Ave. and found flames had e rupted on the sixth floor of a residential building and already spread into the attic and roof, according to the San Francisco Fire Department. More than 100 firefighters and over 50 fire apparatus, along with police and other city agencies, responded to the scene. The building’s older construction, such as multiple light wells and lath-and-plaster walls, gave the crews a tough time, fire officials said. During the initial alarms, crews rescued multiple residents. Two cats were also saved and treated. No injuries were reported. The fire was contained by 5:30 a.m. The department said 45 residents were displaced and were being sheltered in a Muni bus near the site. The American Red Cross has been called in to help them. The cause of the fire wasn’t immediately known. ...read more read less