美国：俄罗斯违反一项核武器条约

The United States has accused Russia of violating a historic nuclear test ban treaty by testing a ground-launched cruise missile.

U.S officials say President Barack Obama informed Russian President Vladimir Putin in a letter Monday of the U.S.' determination that Russia broke the 1987 treaty.  The move was first reported Monday evening by The New York Times.

The U.S. says Russia tested a new ground-launched cruise missile, breaking the Intermediate-Range Nuclear Forces Treaty that President Ronald Reagan signed with Soviet leader Mikhail Gorbachev.

The Intermediate-Range Nuclear Forces Treaty was designed to eliminate ground-launched cruise missiles with ranges of 500 to 5,500 kilometers.

U.S. officials said the Obama administration is willing to hold high-level discussions on the issue and wants assurances that Russia will comply with the treaty requirements going forward.

There was no immediate response from Moscow.