Montenegro has banned access to popular social networking and video sharing websites such as Facebook and YouTube in all state-run institutions, a statement said.

From Thursday, employees in government offices and the parliament trying to log on to their Facebook accounts during working hours are greeted with an "access denied" message, reported Reuters.

The office in charge of maintaining the government's network explained that they sought to avoid a meltdown of its system from excess traffic.

"Therefore, during working hours, access to certain potentially malicious and huge traffic generating websites is disabled," the office said in the statement.

Montenegro with a population of 650,000 has posted significant growth in Internet use in recent years and has 14,100 Facebook users. The popularity of YouTube has also grown quickly.

According to the latest providers' data, the current Internet penetration rate is close to 40 per cent, compared to just 8 per cent three years ago.