The British Ministry of Defense reports this on Twitter.
British military intelligence notes that since the beginning of Russia's invasion of Ukraine, Russian public officials and workers have been subject to increasingly severe foreign travel restrictions. Some officials have likely had to forfeit their passports to the Federal Security Service.
Close to the center of power, employees face more severe restrictions. In particular, Kremlin officials are banned from all international leisure travel.
Such measures date back to Soviet times. And travel restrictions were tightened after the Russian annexation of Crimea in 2014.
"The measures are likely designed to prevent the flight or defection of increasingly disaffected officials. There is a realistic possibility that as the securitisation of the Russian state continues, travel restrictions will be tightened for an increasing number of public sector employees," the British intelligence concluded.