U.S. says to discuss possible new Russia sanctions with Europe

U.S. Secretary of State John Kerry (L) meets with NATO Secretary General Jens Stoltenberg at the start of a NATO foreign ministers meeting in Brussels, December 2, 2014. REUTERS/Virginia Mayo/Pool

BRUSSELS (Reuters) - U.S. Secretary of State John Kerry will talk to European allies this week about imposing further sanctions on Russia if pro-Moscow separatists in Ukraine do not halt violence, a senior State Department official said on Tuesday.

The United States and the 28-nation European Union have both imposed sanctions on Russia's financial, defence and energy sectors over Moscow's annexation of Crimea and its support for the separatists in eastern Ukraine.