Mission tire shop blaze reaches 3 alarms

One building is threatening to collapse and another has been evacuated at the scene of a three-alarm blaze involving a tire shop in San Francisco’s Inner Mission this morning, according to firefighters.

The incident was first reported at 7:45 a.m. in the vicinity of Shotwell and 16th streets.

Some flames have spread to an apartment building next door, prompting officials to evacuate the structure.

Further details about the incident were not immediately available.\