KRON 4 is reporting:

SAN FRANCISCO (KRON) — A large fire has broken out in the Mission District at 15th and South Van Ness Ave.

There are reports that the fire is being fueled by propane at an industrial building of some sort.

According to a dispatcher for the San Francisco Fire Department, the call was first reported as a propane tank explosion that ignited a building near 17th St. between South Van Ness Ave. and Shotwell St.

Witnesses in the area reported hearing multiple explosions.

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5. More information on the explosion