Hungarian authorities detained seven Ukrainian citizens and seized two armored cars carrying large amounts of cash across Hungary on suspicion of money laundering, officials said Friday. Ukraine accused Hungary's pro-Russian government of taking the Ukrainians hostage and illegally seizing millions of dollars in cash.

Ukrainian Foreign Minister Andrii Sybiha has said that Ukraine reserves the right to take response measures after Hungary detained Ukrainian cash-in-transit vehicles carrying cash and gold as well as

Hungarian Prime Minister Viktor Orban has pledged to use “political and financial tools” to force Ukraine to restart flows through the Druzhba pipeline, the key route for Russian oil to Hungary and Slovakia.

Hungary’s foreign minister is accusing Ukraine of trying to sway Hungary’s election, as a dispute over Russian oil drives tensions higher.

Hungary’s seizure of seven Ukrainian bank staff transporting cash ratchets up dispute between Budapest and Kyiv