Bulgaria’s Foreign Ministry has issued a warning over the strike of truck owners in its southern neighbor, which has starved Greece of fuel.

“The Ministry recommends that all Bulgarians traveling to Greece should fill up their tanks with enough gas in order to be able to reach their destination and to come back,” says a special statement released Thursday.

The Foreign Ministry has made it clear that it did not have any information about Bulgarians stranded in Greece but points out that the truck owners has created “temporary problems” with the supply of fuels in the latter.