Labour chiefs have called in police as part of an inquiry into claims party HQ staff worked secretly for a Tory election victory.
A probe was ordered by new Labour leader Keir Starmer and approved by an emergency meeting of the National Executive Committee last week.
Death threats and abuse against staff involved have been reported and police called as the wide-ranging probe gets under way.
A full-scale operation has been mounted to shut down distribution of a leaked report alleging that senior campaign managers were part of a clandestine group trying to stop Jeremy Corbyn becoming PM.
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