Ukrainian Prosecutor General Ruslan Kravchenko left the country overnight, media reported, just a few days after submitting his resignation in connection with a corruption scandal.
He is reported to have left for Poland. On Monday, he levelled accusations against Ukraine's anti-corruption authorities, calling on their heads to resign.
Investigations have been launched against the head of the anti-corruption agency NABU, Kravchenko said in a video posted on social media.
He alleged that NABU chief Semen Kryvonos had forged official documents to gain huge unlawful advantages. Kravchenko also spoke of further investigations into another agency tasked with combating corruption.
Kravchenko said that he was on a "business trip" abroad. The Centre for Combating Corruption, a non-governmental organization, alleged that President Volodymyr Zelensky had allowed him to leave the country despite the ongoing investigations.
Officially, Kravchenko is still the prosecutor general - a vote on his dismissal is due to take place in parliament.
Zelensky responded 50 minutes after the publication of Kravchenko's video.
"There is only one path for this prosecutor general: dismissal from office. That is exactly what I told him," Zelensky wrote on Telegram. He called on lawmakers to support the dismissal. The vote has now been announced for Tuesday.
Despite half a dozen anti-corruption agencies being established since 2014 with Western assistance, Ukraine is regarded by experts at the Transparency International advocacy group as one of the most corrupt countries in Europe.
The Eastern European country has been defending itself against a Russian invasion since February 2022 and is receiving billions in support from the West.