"Losing electricity and Internet access are among 'extreme but possible' scenarios that Lithuania's central bank told finance companies to be ready for in a letter sent to them last week and seen by Reuters," according to the news agency.
"Increased geopolitical tension in the region leads to increased threats of cyber-attacks, including attacks on critical information infrastructure," the Bank of Lithuania reportedly warned in the letter.
The central bank told BNS in a comment that it regularly checks if financial institutions meet the ICT and security risk management requirements and how they update their business continuity plans, as part of efforts to ensure that financial market participants are prepared for different scenarios.
"Cyber security is a topic of growing importance and it is crucial that market participants pay due attention to this issue," it said.
Lithuania, Latvia and Estonia are still part of the BRELL electricity system that is run from Moscow.