Arseniy Yatseniuk should serve as Ukrainian prime minister until the appointment of a new prime minister, UDAR faction leader Vitaliy Kovalchuk has said.

"The UDAR faction believes that Yatseniuk should perform the duties of the Ukrainian prime minister prior to the formation of a new government, which will be formed after the parliamentary elections by a new coalition," he told journalists in Kyiv on Friday.

He said that "the Cabinet of Ministers and Yatseniuk should properly perform their duties."

"If they [government members] sabotage their activities, then I think their actions should be assessed by the Prosecutor General's Office."

Kovalchuk said that Yatseniuk's statement of resignation was emotional.

He also noted that the prime minister had not written a letter of resignation, but had only verbally spoken about it.

"Today the Verkhovna Rada chairman does not raise the issue of the consideration of Yatseniuk's statement, because there is physically no statement. There is a public speech by Yatseniuk, and in accordance with the Constitution, Yatseniuk had to file the statement," Kovalchuk said.

He said: "Today, Yatseniuk is [still] the prime minister."