"Society wants a full reset of state authorities," Poroshenko said in a statement, adding that the move showed that those who decided to quit the coalition were following the will of the people.

Politicians and pro-European activists have complained that while Ukraine has a new president, it has yet to elect a new parliament since the toppling of Yanukovych in February, and accuse his supporters of hampering its work.

Yatseniuk said that by blocking legislation, like a bill to allow consortiums with European or U.S. companies to operate Ukraine's ageing gas distribution system and storage facilities, parliament was putting Ukraine's future at risk.

By not tackling budget spending, it was also putting the lives of Ukraine's soldiers in jeopardy, he said.

"It's unacceptable that because laws have not been passed, we now have no means with which to pay soldiers, doctors, police, we have no fuel for armored vehicles, and no way of freeing ourselves from dependence on Russian gas," he said. (rt/ez)