KIEV - Ukrainian President Volodymyr Zelensky announced on Friday that the head of his office Andriy Yermak has submitted a letter of resignation.

"I want there to be no questions about Ukraine. Therefore, the following internal decisions are being made today: first -- the presidential office will be rebooted. The head of the office, Andriy Yermak, has submitted his resignation," Zelensky said in a video address.

Earlier in the day, anti-corruption authorities conducted searches in Yermak's home as part of an investigation, the National Anti-Corruption Bureau said, without giving further details.

Zelensky thanked Yermak, saying that Ukraine's negotiating position had always been presented properly and had always been a patriotic one.

Last week, Yermak was appointed as head of the Ukrainian delegation for talks with the United States, Russia and other relevant parties.