Ukraine's President Volodymyr Zelensky issued executive orders late on Sunday dismissing the State Security Service head and the Prosecutor General.
The orders dismissed domestic security chief Ivan Bakanov, a childhood friend of Zelenskiy, and Prosecutor General Iryna Venediktova, who leads the effort to prosecute Russian war crimes in Ukraine, were published on the president's official website.
No reason was immediately given for the sackings.