Proton Technologies, which is headquartered in Geneva and says it is the world's largest secure email provider, said the sent time confirmed it came after the Ryanair passenger plane was diverted to Belarus.
"Based on the screenshots of the leaked email that were posted online, it was leaked by somebody with access to the receiving mail server in Belarus. The receiving mail server also has a copy of the email." The Belarusian authorities claimed that Minsk had received a threatening email from a ProtonMail address purportedly from the Palestinian Islamist group Hamas claiming that a bomb was on board flight FR4978.
Mabye it could have been a Hijack using state functions including military