American and other Western officials said an explosion on a plane believed to be carrying the Russian mercenary leader Yevgeny V. Prigozhin likely brought down the aircraft on Wednesday, killing all the passengers aboard, based on preliminary intelligence reports.
A definitive conclusion has not been reached, but an explosion is the leading theory of what caused the plane to crash in a field between Moscow and St. Petersburg. The explosion could have been caused by a bomb or other device…
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