SAN FRANCISCO (CBS SF) — Fire crews doused a fire at two portable toilets in San Francisco’s South of Market neighborhood Sunday afternoon, a fire dispatcher said.

Firefighters responded to the 300 block of Bryant Street at 1:32 p.m., according to the dispatcher.

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He said there were no injuries and firefighters left the scene around 3 p.m.

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The dispatcher said fire crews are still determining the cause of the fire. As to whether the fire was set intentionally, the dispatcher said the temporary toilets “usually don’t burst into flames on their own.”

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