Firefighters in San Francisco quickly extinguished a structure fire in the city’s outer Mission District this morning.

Fire was reported in a three-story apartment building at 5570 Mission St. at around 3:15 a.m., a San Francisco Fire Department dispatcher said.

Arriving firefighters kept the one-alarm blaze contained to primarily one unit and declared it under control at around 3:35 a.m.

No injuries were reported.

The cause of the fire was under investigation.

Please make sure your comment adheres to our comment policy. If it doesn't, it may be deleted. Repeat violations may cause us to revoke your commenting privileges. No one wants that!