MPs Mr Gwynne and Mr Ryan have been suspended while Labour investigates the extent of the messages in the group, and could lose the Labour whip altogether.
Days after he was sacked by Sir Keir Starmer and suspended by Labour, fresh messages have emerged suggesting Andrew Gwynne joked about killing a fellow MP with a pickaxe and said a prominent community member should be bullied.
A Labour Party spokesperson said: "As part of our WhatsApp group investigation, a group of councillors have been administratively suspended from the Labour Party.
Labour has suspended the whip from Mr Gwynne as well as fellow MP Oliver Ryan, who was elected in July, over his involvement in the group.
The party has also suspended 11 Labour councillors, including Mr Gwynne’s wife, for being part of the WhatsApp group.