Russia says hypersonic missile scientists face 'very serious' treason accusations

A Russian armoured personnel carrier and S-400 surface-to-air missile systems drive past the Kremlin wall after a military parade on Victory Day, which marks the 78th anniversary of the victory over Nazi Germany in World War Two, in Moscow, Russia May 9, 2023. REUTERS/Maxim Shemetov/File Photo

MOSCOW (Reuters) - Three Russian academics who have worked on hypersonic missile technology face "very serious accusations", the Kremlin said on Wednesday, in a treason investigation that has spread alarm through Russia's scientific community.

Kremlin spokesman Dmitry Peskov said he was aware of an open letter from Siberian scientists in defence of the men, but that the case was a matter for the security services.