President Volodymyr Zelensky has issued a decree prohibiting Ukrainians from engaging in any negotiations with Russian President Vladimir Putin.
On Tuesday, the decree, which was initially announced on Friday, was posted on his website.
In response to the annexation of four Ukrainian regions in the south and east of the nation, the Council for Security and Defence of Ukraine made the decision.
The council, made up of cabinet members and the heads of the armed forces and security services, and headed by Zelensky, saw the annexation as a violation of international law.
While Russia has occupied large parts of Luhansk, Donetsk, Zaporizhzhya, and Kherson, and has declared them annexed, Ukrainian forces have been gradually pushing them out of these regions.
Kiev has virtually ruled out talks before a complete Russian withdrawal as its forces retake large parts of the occupied regions.