Seven Labour MPs - Chuka Umunna, Chris Leslie, Luciana Berger, Gavin Shuker, Mike Gapes, Ann Coffey and Angela Smith - resigned the party over complaints over Jeremy Corbyn’s handling of Brexit and anti-Semitism.
Announcing the resignations, Ms. Berger said: "I have become embarrassed and ashamed to remain in the party."
According to her, they will now sit in the Parliament as an "independent group of MPs".
Reuters reported in the morning the Labour source, close to the group, said these departures could trigger a second wave of resignations, underlining the frustration over Corbyn’s approach to Britain’s biggest shift in foreign and trade policy in more than 40 years.
Corbyn has so far stuck to Labour policy to keep the option of a second referendum “on the table” if Prime Minister Theresa May’s government fails to secure a deal with Brussels that can pass through parliament.
Reacting to the resignations, Mr Corbyn said: "I am disappointed that these MPs have felt unable to continue to work together for the Labour policies that inspired millions at the last election and saw us increase our vote by the largest share since 1945," the RTE News reported.