A violent antisemitic threat made against Luciana Berger, the Labour MP, was known to party officials for at least six months but they failed to alert police

The Labour Party failed to alert police to a violent antisemitic threat made against one of its MPs that is now subject to a criminal investigation.

Party officials were aware of the threat to Luciana Berger, who is Jewish, for at least six months and included it in a dossier of abuse by members being investigated by the party.

Neither Ms Berger nor the police were informed, however, and an investigation began only after the dossier was leaked to the radio station LBC, which passed it to Cressida Dick, the Metropolitan Police commissioner.

Yesterday Ms Dick said that after an initial investigation the information contained in the leaked document suggested that a crime may have been committed and a full inquiry would be launched.

Labour