Follow the latest information in our LIVE COVERAGE "The embassy is closely ... on Thursday that it had summoned US Ambassador Lynne Tracy to inform her about Moscow's stance.

Russian authorities and news reports say an explosion in an upscale Moscow neighborhood killed two people, including the founder of a battalion that battled Kyiv’s forces in eastern Ukraine.

A pro-Russian paramilitary leader from eastern Ukraine, Armen Sarkisyan, was killed when a bomb tore through parts of a luxury apartment block in Moscow, state news agency TASS and other Russian media ...