Labour have suspended veteran MP Kelvin Hopkins while they investigate allegations received by the party.
Mr Hopkins has served as MP for Luton North since Labour's landslide victory at the 1997 General Election.
The 76-year-old is a former trade union worker and was one of 36 MPs to nominate Jeremy Corbyn for the Labour leadership in 2015.
He briefly served in Mr Corbyn's top team as shadow culture secretary last summer.
A Labour spokesperson said: "On the basis of allegations received by the Labour Party today, Kelvin Hopkins has been suspended from party membership, and therefore the Labour whip, while an investigation takes place.
"The Labour Party takes all such complaints extremely seriously and has robust procedures in place to deal with them."