A senior U.S. official told ABC News the explosion that brought down Yevgeny Prigozhin's plane was likely caused by a bomb. WATCH the ABC News Live Stream Here: youtube.com/watch?v=w_Ma8oQLmSM SUBSCRIBE to ABC NEWS: bit.ly/2vZb6yP Watch More on abcnews.go.com LIKE ABC News on FACEBOOK facebook.com/abcnews FOLLOW ABC News on TWITTER: twitter.com/abc #prigozhin #putin #abcnews #ABCNLUpdate