Citing national security issues, Ukrainian officials on Friday said the country's government agencies, military and critical infrastructure will be restricted from using the Telegram social media app.

Telegram is heavily used in both Ukraine and Russia and has become a critical source of information since the Russian invasion.

Ukraine has announced a ban on the use of the Telegram app on devices used by state officials, as well as military personnel and key workers.

Ukraine has told government and army officials to stop using the messaging app Telegram, warning that Russia may have access to data and communication on the popular communication channel. Telegram has become a vital messenger service on both sides of the war,