(QHA) -

Russian Prime Minister Dmitry Medvedev says it is up to the West to improve severely strained relations with Moscow by scrapping sanctions imposed over the Ukraine crisis.

Medvedev spoke after an East Asia summit in Burma, also known as Myanmar, where he said he exchanged greetings with Barack Obama but had no substantive discussion with the U.S. president.

"I hope this period of...our relations with Europe and the United States will be overcome, but I emphasize, the ball is in their court" -- they must take the necessary decisions," Medvedev said.

"It's necessary to simply abandon sanctions... to return to normal, productive talks -- then everything will stabilize," he addd.

The United States and the European Union have imposed sanctions on Russia over its annexation of Crimea and support for pro-Russian separatists in eastern Ukraine.