No time left to extend key US-Russia arms treaty: diplomat

A senior Russian diplomat says Moscow and Washington are running out of time to extend the last remaining nuclear arms control treaty

Leontyev said Russia's prospective Sarmat intercontinental ballistic missile and Avangard hypersonic glide vehicle fall under the pact, but other new weapons announced by President Vladimir Putin don't, including the Poseidon nuclear-armed underwater drone, the Burevestnik nuclear-powered cruise missile and the Kinzhal hypersonic missile.

He said the U.S. sees things differently, raising the need for new, complex talks..