Eleven senior members of Britain's Opposition Labour Party have withdrawn support for the leadership of Jeremy Corbyn, plunging the party into crisis in the wake of Britain's vote to leave the European Union.
At the weekend, Corbyn said he would resist any attempt to oust him following criticism by some Labour MPs that he had not done enough to convince millions of voters in the party's heartlands to back remaining in the EU.
He did not immediately respond to the resignations.
Britain is not due to hold a parliamentary election until 2020, but after Prime Minister David Cameron's resignation after losing the referendum, many expect that one could now be called earlier by his successor, putting pressure on Labour to present itself as a credible alternative.
The Labour leader sacked his foreign policy spokesman Hilary Benn on Sunday after Benn said he had lost confidence in the ability of Corbyn, who is on the party's far left, to lead Labour.