NATO has expressed its fears of new acts of sabotage and serious cyber attacks on the alliance's territory, a senior official said on the sidelines of a meeting of NATO foreign ministers in Brussels.

The official said that Russia in particular appears more willing to harm or endanger lives through sabotage in NATO member states.

He added that China, Iran and North Korea are also active in carrying out cyber attacks.

The official noted that Beijing, like Moscow, is carrying out an ongoing campaign to spread malware. The aim is to conduct espionage activities, in addition to the ability to cause unrest if tensions escalate.

Russia is particularly targeting critical infrastructure, especially industrial control systems, according to the official.

The official gave an example of a major attack, possibly carried out by Iran, on NATO member Albania, which disrupted the border control system, and Interior Ministry files were published on the Internet.

The official explained that everything was made public after the attack, including police files, emails between officers, confidential certificates and Interpol files.