There were two incidents of arson in the Mission district in the past two days, police said.
The first incident occurred in the 1500 block of Bryant Street about 6:55 a.m. Sunday.
In that case, unknown suspects used bolt cutters to cut the locks off of a garbage dumpster and then set the contents of the dumpster on fire, police said.
Then early Monday morning about 2:14 a.m., police responded to the 2900 block of Folsom Street on reports of a vehicle on fire.
The Fire Department responded and put out the fire, then deemed the incident arson.
There are no known suspects in either case.