LONDON — British lawmakers crushed Prime Minister Theresa May's European Union divorce deal on Tuesday, thrusting Britain deeper into crisis and forcing parliament to decide within days whether to back a no-deal brexit or seek a last-minute delay.

Lawmakers voted against May's amended brexit deal by 391 to 242 as her last-minute talks with EU chiefs on Monday to assuage her critics' concerns ultimately proved fruitless.

The vote puts the world's fifth largest economy in uncharted territory with no obvious way forward; exiting the EU without a deal, delaying the March 29 divorce date, a snap election or even another referendum are all now possible.

May might even try a third time to get parliamentary support in the hope that hardline eurosceptic lawmakers in her Conservative Party, the most vocal critics of her withdrawal treaty, might change their minds if it becomes more likely that Britain might stay in the EU after all.

Lawmakers will now vote on Wednesday on whether Britain should quit the world's biggest trading bloc without a deal, a scenario that business leaders warn would bring chaos to markets and supply chains, and other critics say could cause shortages of food and medicines.

May said the government would not instruct her own party's lawmakers how to vote, as would normally be the case.

An opposition Labour Party spokesman said this meant she had "given up any pretence of leading the country". May's political spokesman said she had not discussed resigning.

The prime minister, hoarse after Monday's late-night talks, told lawmakers: "Let me be clear. Voting against leaving without a deal and for an extension does not solve the problems we face."

Graham Brady, an influential Conservative lawmaker, said the two most likely scenarios were leaving the EU without a deal "or some kind of endless delay".

The European Union said the risk of a damaging no-deal brexit has "increased significantly" but there would be no more negotiations with London on the divorce terms.

Opposition to May's deal among members of the Conservative Party derives from a belief that it does not offer the clean break from the European Union that many voted for.

Supporters of brexit argue that, while a "no-deal" divorce might bring some short-term instability, in the longer term it would allow the United Kingdom to thrive and forge beneficial trade deals across the world. — Reuters