It was unclear if Darchiev was in the U.S. at the time of his death, and a cause was not immediately provided.

KYIV/WASHINGTON, Nov 10 (Reuters) - Russian and Ukrainian officials planned to meet on Tuesday ⁠for ⁠two days of US-brokered talks — their first since February — after ⁠President Donald Trump suggested last week that a broad peace deal was possible in their 4-1/2-year-old war and could incorporate Europe's security.