March 6 (UPI) -- Ukraine's foreign minister accused Hungary of kidnapping seven Ukrainian state bank employees and stealing the cash and gold they were transporting, and Hungary announced it would expel the bank staff.

Ukraine's Oschadbank said on Thursday that two vehicles with seven employees and about $75 million were stopped in Budapest Thursday, and Kyiv has lost contact with the personnel. The vehicles were transporting cash and gold from Austria to Ukraine.

Budapest announced Friday that the seven bank employees would be expelled from Hungary, and accused the seven people detained of money laundering.

On Wednesday, Hungarian Prime Minister Viktor Orbán and Ukrainian President Volodymyr Zelensky traded threats and accusations. Budapest blamed Kyiv for blocking a Russian oil pipeline into Hungary, but Kyiv said the pipeline was damaged by a Russian air strike in January, the BBC reported.

One month before the Hungarian elections, Orban is trailing in polling.