Officials detonated a World War II artillery shell that was found at a construction site in Palo Alto Wednesday.
A construction crew working on a hillside in the 3200 block of Alexis Drive found a 3-by-12-inch shell at about 2:25 p.m., and it was detonated by the Santa Clara County bomb squad at about 5:35 p.m., Palo Alto police said.
The crew evacuated the site and notified authorities.
The Santa Clara County bomb squad responded and detonated the device at about 5:35 p.m., police said.
The shell was old, unstable, and had been hit by construction equipment. It was therefore detonated in place, according to police.
No homes were evacuated.
An even earlier artillery shell was discovered along a fenceline of Palo Alto's Foothills Park in February 2008, when two rangers spotted an "extremely rusty" shell. The shell was detonated shortly before midnight by the county bomb squad.
That shell, also found along Alexis Drive, apparently dated from World War I, when the area was used briefly for artillery practice as part of the Camp Fremont training program.