The Los Angeles Police Department’s Bomb Squad was called to a residence in the Hollywood Hills on Monday after the homeowner found a Civil War-era cannonball while he was cleaning out the basement.

The incident occurred around 11:00am in the 2900 block of Durand Drive, located between Beachwood Drive and the Hollywood Reservoir. Sgt. Sal Ogaz, with the LAPD’s Hollywood Division, said the bomb squad members x-rayed the cannonball and determined it was not filled with explosives. They took custody of the item, and it will likely be destroyed, he said.

Ogaz said the unidentified homeowner purchased the residence approximately 18 years ago, and also found suspicious devices at that time. In 1992, the bomb squad took custody of a replica hand grenade and two additional cannonballs that had been left in the basement by the previous owner. The bomb squad analyzed the items, and determined that they contained no explosives, Ogaz said. The current homeowner did not realize that there was an additional cannonball left until Monday, he added.

“There is a lot of stuff people find, like ammunition, that we have to have the bomb squad come out to determine what it is,” Ogaz said. “It was a little unusual, but it wasn’t a big deal. For me, I thought a cannonball was a big metal ball loaded with explosives, but that wasn’t the case with this one.”

Ogaz did not know who the previous homeowner was, but officials believe he or she was a collector of antique military items, and was not involved in any criminal activity. The incident forced a small number of residents to evacuate from the immediate area around the residence, Ogaz said, but everyone was allowed back in their homes around 12:30pm.