Iran press/Europe: Raab's departure put pressure on other cabinet members to quit, raising the prospect of a "domino effect" that could end in the break-up of the cabinet, according to BBC report.
In his resignation letter, Raab said he could not support it because the regulatory regime proposed for Northern Ireland "presents a very real threat to the integrity of the United Kingdom".
He added, the "backstop" arrangements aimed at preventing the return of a hard Irish border would result in the EU "holding a veto over our ability to exit".
"Above all, I cannot reconcile the terms of the proposed deal with the promises we made to the country in our manifesto at the last election," he told the prime minister.
Speculations for breacking up the cabinet raises
Brexit-backing former minister Iain Duncan Smith told the impact of Raab's resignation would be "devastating" and his letter suggested he had been ignored within government.
Remain-backing Conservative MP Anna Soubry tweeted: "Raab's resignation marks the end of prime minister's withdrawal agreement. This is very serious. The prime minister will clearly be considering her position. My own view is that we need a government of national unity and we need it now."
Labour's shadow Brexit secretary, Sir Keir Starmer, said: "It is now clear the prime minister didn't have the backing of her cabinet."
He urged May to "listen to Parliament" where, he claimed, there would be a "growing majority" against a no-deal Brexit and in favour of other options.
Earlier on Thursday, Shailesh Vara quit as Minister of State for Northern Ireland, saying he could not support May's agreement, which he said "leaves the UK in a halfway house with no time limit on when we will finally be a sovereign nation".
The resignations came as European Council President Donald Tusk announced an emergency meeting of EU leaders in Brussels on 25 November, at which the withdrawal agreement and a political declaration on future relations will be finalised and formalised.
On November 14, Theresa May announced that she had secured the backing of her cabinet for the agreement, after a five-hour meeting but several ministers were understood to have spoken against it and there are suggestions of moves among Conservative backbenchers to force a no-confidence vote in her.
The British people (England, Scotland, Wales, and Northern Ireland) voted in a referendum for the exit of the country from the European Union on June 23, 2016.
However, the results of a new poll show that more than half of the British people prefer to stay in the EU. 208/103
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