The Investigative Committee said that Lt. Gen. Yaroslav Moskalik, a deputy head of the main operational department in the General Staff of the Russian armed forces, was killed by an explosive device placed in his car in Balashikha, just outside Moscow, Russia’s capital.

The explosion coincided with the arrival of White House envoy Steve Witkoff in Moscow to talk with Russian President Vladimir Putin about the war in Ukraine. NBC News’ Keir Simmons reports.