This page contains information regarding Star Trek: Lower Decks, and thus may contain spoilers.
In 2381, Captain Dorg of the Klingon Bird-of-Prey IKS Che'ta' provided Rebner of the Pakled clumpship Pakled with a Varuvian bomb, for a plan to smuggle the bomb to Earth. However, he was forced to give them another after they tested the first one on a large asteroid in System 7743.8. (LD: "The Spy Humongous", "wej Duj")
A Varuvian bomb was responsible for the destruction of Pakled Planet later that year, when one was planted in the capital city. Starfleet Command obtained evidence that Captain Carol Freeman collaborated with Klingon extremists in the act, and promptly arrested her. (LD: "First First Contact")