On Monday a major DDOS attack has targeted Lithuania's national network infrastructure, more than a week after EU sanctions took effect for Kaliningrad, and neighboring Lithuania took the dramatic step of banning land transport of goods, including transport of steel and ferrous metals to the Russian exclave.

The group now claiming responsibility for the cyberattack, called "Killnet", has expressly stated it's in retaliation for the Kaliningrad 'blockade'. "Lithuanian state and private institutions were hit by a denial-of-service cyber attack on Monday, the Baltic country's National Cyber Security Centre said in a statement released by the defense ministry," Reuters reports.