A radioactive wasp was found next to a site in South Carolina that once made key parts for nuclear bombs.

Employees who routinely check radiation levels at the Savannah River Site near Aiken found the nest on July 3 on a post near tanks where liquid nuclear waste is stored, according to a report from the US Department of Energy.

The nest had a radiation level 10 times what is allowed by federal regulations, officials said.

The workers sprayed the nest with insect killer, removed it and disposed of it as radioactive waste. No wasps were found, officials said, and there is no danger to anyone.

The report said there is no leak from the waste tanks, and the nest was likely radioactive through what it called “onsite legacy radioactive contamination” from the residual radioactivity left from when the site was fully operational.