A bomb squad was called on Wednesday after the Vallejo Naval and Historical Museum in California received a live grenade as a donation.
Trevor Allen, the museum’s executive director, told Fox News Digital the live explosive was from a "well-meaning" donor.
Museum staff set the object outside away from visitors, alerted authorities, and evacuated the building. Police closed off the street and called in a bomb squad from nearby Travis Air Force Base.
The bomb squad deemed the ordnance safe to transport back to base after conducting an on-site visual inspection and x-ray scan. The item is now with Travis Air Force Base Explosive Ordnance Disposal (EOD) and will remain there to prevent future concerns, the base said.
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Allen said the grenade was an "innocent mistake" on behalf of a well-meaning donor. He credited operations manager Paul Goodrum for identifying the object as dangerous.
No injuries were reported, and the museum was re-opened to the public on Thursday.
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The scare came after a man was killed, and his two teenage children were injured last month after a live grenade found in a grandfather’s belongings detonated in Lake County, Indiana.
Fox News’ Greg Wehner contributed to this report.