SAN FRANCISCO (CBS SF) — Fire crews in San Francisco contained a three-alarm on the 4200 block of 23rd Street in the Noe Valley neighborhood that damaged four homes early Wednesday morning and left a firefighter with minor injuries.

The San Francisco Fire Department’s media Twitter account posted about the fire at about 2:12 a.m. The Citizen App page for the incident said the fire in the garage of a home was reported shortly before 2 a.m.

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Fire department officials said that there was a live wire involved at the scene. By 2:19 a.m. a third alarm had been called and the fire had spread to the roof and two other single-family homes.

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Fire personnel said an initial search of the structure indicated that no one was trapped in the home. So far there were no reports of injuries.

As of about 2:45 a.m., firefighters on scene reported that the fire was contained and was no longer spreading.

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After initially saying that the fire had damaged three homes, the fire department provided a later update that four homes were damaged and six adults displaced by the fire. The update also noted that one firefighter suffered from a minor injury and was reportedly treated for exhaustion.