Czech Republic offers limited oil supply east to Slovakia via pipeline

"We are prepared to immediately start preparations of technical and investment measures, and supply (larger volumes) in the horizon of one year," Havlicek said in a text message.

Slovakia and Hungary have kept buying Russian energy after Russia's invasion of Ukraine, but oil flows via the Druzhba through Ukraine have been halted since January 27 due to what Ukraine said was Russian attack that hit the pipeline infrastructure.

Hungary and Slovakia have asked Croatia to allow Russian seaborne oil to be shipped via its port and pipeline, which Slovak and Hungarian refineries have used to a limited extent for alternative supplies.

Croatia said on Tuesday it could raise deliveries, but it should not be Russian oil. (Reporting by Jan Lopatka; Editing by David Goodman and Jan Harvey)