Residents in San Francisco’s Noe Valley neighborhood are being evacuated this afternoon after police detained a man and then called the bomb squad to the area, a police spokesman said.

Around 12:40 p.m., police were notified about a suspicious person in the 4100 block of Cesar Chavez Street, Officer Gordon Shyy said.

Arriving officers found a man in the carport area of a residential building and detained him.

While responding, officers determined there were a suspicious object or substance in the area and called for the department’s bomb squad and hazardous materials team to come to the area.

Homes on the dead-end street were evacuated around 1:45 p.m. and the intersection of Castro and Cesar Chavez streets was blocked off to pedestrians and motorists, Shyy said.

As of 2:50 p.m., the area remained shut down.

No injuries have been reported, Shyy said.

Sasha Lekach, Bay City News

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