San Francisco fire: 140 firefighters battle huge blaze and people urged to avoid area

More than a hundred San Francisco firefighters were at the scene of a four-alarm fire Tuesday morning at a building that was under construction

More than a hundred San Francisco firefighters were at the scene of a four-alarm fire Tuesday morning. Firefighters are battling the huge blaze as the Fire Department urges people to avoid the area.

The fire was burning in the area of Octavia Boulevard and Oak Street. The site is an apartment building under construction.

Videos from the scene showed massive flames erupting from the scaffolding frame of the four-story building and firefighters dousing the structure with water.

No injuries have been reported at this time, the fire department said. Around 130 firefighters were summoned to put out the flames, the Fire Department said. It is currently unclear how the fire started.