“If I die under mysterious circumstances, it’s been nice knowin ya.” — Tweet from Elon Musk

Elon Musk suggested he might die “under mysterious circumstances” in a cryptic tweet that appeared to be referring to a threat by the chief of Russia’s space agency.

“If I die under mysterious circumstances, it’s been nice knowin ya,” Musk said in the tweet Sunday night.

The Tesla and SpaceX CEO posted the ominous tweet shortly after he shared a message from Dmitry Rogozin, who accused him of being “involved in supplying the fascist forces in Ukraine with military communication equipment.”

“And for this, Elon, you will be held accountable like an adult – no matter how much you’ll play the fool,” added the former deputy Russian prime minister who now heads the country’s space agency.