A preliminary U.S. intelligence assessment has found that the plane crash presumed to have killed Wagner leader Yevgeny Prigozhin was intentionally caused by an explosion. That's according to U.S. and Western officials. The officials were not authorized to comment and spoke on the condition of anonymity. One of them says the explosion falls in line with Russian President Vladimir Putin’s “long history of trying to silence his critics.” The officials did not offer any details Thursday on what caused the explosion believed to have killed Prigozhin and several of his lieutenants to avenge a mutiny that challenged the Russian leader’s authority. The White House has declined to comment.