A San Francisco police bomb squad determined that a suspicious device found in the city's Presidio this morning was a World War I mortar shell, Sgt. Wilfred Williams said.
At about 10:20 a.m., a person walking a dog reported seeing the device in the Presidio area at Inspiration Point off of Arguello Boulevard.
U.S. Park Police responded, deemed the device it to be suspicious and notified San Francisco police.
According to Williams, authorities cleared out the surrounding area as they investigated the device. The bomb squad determined the device was a World War I mortar shell and it was rendered safe at about 2:45 p.m.