Police are looking into a number of online threats made to MPs following a vote on whether to extend airstrikes against the so-called Islamic State into Syria.
Watch the report by Deputy Political Editor Chris Ship:
A number of Labour MPs said they had received death threats and abuse via social media and -email over their vote.
A Metropolitan Police spokesman told ITV News that officers were aware of the threats and were assessing their nature.
Labour backbencher Stella Creasy said her staff were facing abuse during the debate on the airstrikes in Syria on Wednesday.
One tweet read: "Hilary Benn will never walk the streets of Leeds unprotected again. #criminal #Tory"
Others messaged the shadow foreign secretary to tell him he had let his father Tony Benn down and that he had betrayed his party with the pro-bombing speech.
John Mann said he was on the receiving end of abuse despite making clear he will vote against bombing, blaming inaccurate lists of supposed rebels being circulated among opponents of air strikes.
John McDonnell, the Shadow Chancellor