Labour shadow Foreign Office minister Bambos Charalambous has had the party whip suspended following a complaint about his behaviour.
The Enfield Southgate MP tweeted: “I am aware that there is an allegation that requires investigation by the Labour Party.
“It is right and proper that process is allowed to take place. I will co-operate fully and play my full part. It is not appropriate to say anything further at this time.”
A formal complaint was made to Labour’s independent complaints process, immediately triggering an investigation.
His party membership was administratively suspended within 24 hours, a move that means he will have the Labour whip removed while the probe is carried out.
Charalambous, who will sit as an independent in parliament following the suspension, said he will “co-operate fully” with the process.
He has also been stood down from his frontbench role on the shadow foreign affairs team.
It comes just over a week after the party suspended MP Geraint Davies following allegations of sexual harassment made by a number of women.
Two formal complaints were subsequently submitted to Labour, including one by a sitting Labour MP, according to the Politico.