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Bomb technicians from several local, state and federal agencies were recently called on to dispose of 24 Revolutionary War explosives that were discovered at the Virginia Department of Historic Resources.

Richmond police shared the details of the discovery and disposal in a Facebook post Friday.

The post said museum conservators discovered one explosive black powder core from a Revolutionary War hand grenade and requested the assistance of the Richmond police bomb squad. In the next two days, four more explosives were discovered.

In all, 24 explosives were found — black powder cores from 22 hand grenades and two cannonballs that came from a British ship named “The Betsy.” The ship sank during the Siege of Yorktown in 1781 and was excavated in 1989.

Bomb technicians from Richmond police; Virginia State Police; Henrico County police; the Bureau of Alcohol, Tobacco, Firearms and Explosives; and the FBI spent three days with museum conservators sorting through 128 boxes containing 4,000 artifacts and 10,000 musket balls.

The Facebook post said no one knew about the explosives because the items had been mislabeled. The 24 explosives were taken off site and disposed of. Police said “the operation went off without a hitch.”