Blast, fire severely damages San Francisco home

The San Francisco Fire Department says at least one person was injured in a house explosion and fire Thursday morning in the city's Sunset Neighborhood.

They heard an explosion that shook their homes at about 9:30 a.m.TV news helicopter images showed the front and roof of the row house collapsed. Neighboring buildings had broken windows.In a tweet, the fire department said the block was being evacuated and that people should stay away from the area.