"The explosions were confirmed by police, who reported several buildings with broken windows at Willow Street and damage to a business’s window at Fulton Street; no injuries have been reported.

Explosions were also heard in District 9, which includes the Mission, according to one Twitter user. That report has yet to be confirmed by police."

"Police Captain Derrick Jackson of Northern Station confirmed there was “a small device that was set off in the area of 355 Fulton between Franklin and Gough.”

“There was damage to a business plate glass window, but no civilians were injured,” said Jackson in an email to the Hayes Valley Safe community group."

"A San Francisco police spokesperson told The Standard that on Saturday at approximately 3:50 p.m., police officers assigned to Tenderloin Station responded to Willow Street and Polk Street to a report of a possible explosion.

“When officers arrived on scene, they found that several building windows on Willow Street were broken and a parked vehicle was damaged,” the spokesperson said in an email."