investigators, moscow was ordering prigozhin s hired guns to swear allegiance to the russian flag. prigozhin s body has still not been officially identified, but this hasn t stopped mourners paying tribute outside wagner headquarters. a u.s. official told cbs news they believe the crash was caused by a an explosion, possiy a bomb. western intelligence is pointing the finger at vladimir putin. and accusation the kreremlin has ememphatically d denied, callilt aa lie. we arare fighting fofor free. reporter: the leader of the far right russian volunteer group fighting alongside ukr ukraine, denis kapustin, urged wagner fighters to switch s sids and takeke revenenge. earlier thihis year, prigozhin came to putin s rescue by delivering him his only real victory in bakhmut.