Jeremy Corbyn has lashed out at his own MPs for "indulging in internal factional manoeuvring" against him, following a raft of resignations from the shadow cabinet.
His attack in the House of Commons prompted cries of "resign!" from Labour backbenchers – laying bare the deep divide between Corbyn and his own party.
Dozens of senior MPs have quit the Labour front bench demanding fresh leadership amid claims that Corbyn did not fight hard enough to keep Britain in the EU.
In a packed Commons chamber on Monday, the former shadow ministers stood in gangways and sat on the back benches to hear David Cameron make a statement on the referendum.
Responding to the PM, Corbyn said: "Our country is divided and the country will thank neither the benches in front of me, nor those behind, for indulging in internal factional manoeuvring at this time."
The chamber erupted into jeers and laughter, with several cries of "resign" from the MPs behind Corbyn – prompting Speaker John Bercow to call order.
The Labour leader was flanked by the new shadow foreign secretary Emily Thornberry and his deputy Tom Watson, who hours earlier had warned him he faced a leadership challenge if he failed to stand down.