Labour is to email all party members to warn them that they should not bully or harass MPs, families, or constituency staff, BuzzFeed News has learned.

The move comes after some MPs who backed the government on Syria airstrikes on Wednesday night were subjected to abuse and harassment. One MP claimed in the Commons that colleagues had been sent photos of severed heads.

It is understood the email will be similar to a Facebook post released by the Labour leader yesterday night urging supporters to stop bullying MPs.

Jeremy Corbyn wrote: "I want to be very clear – there is no place in the Labour Party or from those that support us – for bullying of any sort, from any side of the debate. It flies in the face of everything I believe and everything I stand for."

The Facebook post has been shared nearly 5,000 times and has been welcomed by MPs such as John Woodcock, who backed airstrikes.