The Russian defence ministry has drafted a law to ban social media posts by professional soldiers and other military personnel on security grounds.
The bill says photos, videos and other material uploaded to the internet can reveal military details useful to an enemy.
Automatic geolocation can show where a military unit is deployed.
The bill affects "contract" soldiers, who can be sent abroad.
Russian soldiers' posts have revealed forces deployed to Ukraine and Syria.
For example, in July 2014 a BBC Journalist tweeted an image of a post by a Russian soldier who proudly reported delivering Grad rockets to the pro‑Russian rebels in Ukraine.
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