The Hungarian Foreign Ministry has given a Ukrainian consul 72 hours to leave Hungarian territory in response to Kyiv's expulsion of a Hungarian consul, according to the Hungarian site hvg.hu.

"Ukraine is continuing to worsen the conflict," the publication quoted Hungarian Foreign Minister Peter Szijjarto as saying at a press conference in Budapest on Thursday.

"The Ukrainian ambassador in Budapest has been informed that one of the consuls working here must leave Hungary within 72 hours, and this is a proportionate response," he said.

Earlier on Thursday, Ukraine delivered a note to Hungarian Ambassador in Kyiv Erno Keskeny declaring the Hungarian consul in Berehove in the Zakarpattia (Transcarpathia) region of Ukraine persona non grata and demanding that he leave Ukraine within 72 hours.

Ukrainian media reported in September that Hungary had issued passports to Ukrainian citizens at its consulate in Berehove. The reports included a video in which the new Hungarian citizens took the oath of allegiance. After the oath, in which these people call Hungary their homeland and vow to serve it, consulate employees advise them to conceal their Hungarian citizenship from the Ukrainian authorities.

Klimkin discussed the issue with Szijjarto on the sidelines of the UN General Assembly. He said Szijjarto disagreed that the Hungarian consul had breached Ukrainian laws.

Ukrainian Prosecutor General Yuriy Lutsenko said on September 27 that the Ukrainian Security Service was investigating the issuance of Hungarian passports to Ukrainian citizens. Dual citizenship is prohibited in Ukraine.

A criminal case has been opened over high treason.