Foreign Secretary Jeremy Hunt said Tuesday that Britain's governing Conservative Party would be committing "political suicide" if it tries to force through a no-deal Brexit.

Hunt, who is among the 10 candidates vying to replace the outgoing Theresa May as Britain's prime minister, said trying to take the UK out of the European Union without a deal would trigger a general election in which the Conservatives risked being "annihilated."

He said the center-right party would face an existential threat, with voters who supported staying in the EU defecting to the pro-EU Liberal Democrats and those who supported leaving the EU heading to the Brexit Party.

The newly formed Brexit Party led by Nigel Farage topped last week's European Parliament elections.

"The results contain a simple message which we ignore at our peril: if we attempt a general election before we have delivered Brexit we will be annihilated," Hunt wrote in The Daily Telegraph newspaper.

"Attacked by the Brexit Party on the right and the Liberal Democrats on the left, we will face extinction. Any candidate for prime minister whose strategy leads inexorably to a general election is offering a prospectus for disaster."

Hunt said any prime minister who promised to leave the EU by a specific date, without the time to renegotiate and pass a new deal, would effectively be committing to a general election because parliament would bring down the government.

"Trying to deliver no deal through a general election is not a solution. It is political suicide," he wrote.

Rival leadership candidates, including former foreign secretary Boris Johnson and former Brexit secretary Dominic Raab, have said Britain must be prepared to leave the EU without a deal.

Britain is due to leave the EU on October 31, while the next general election is not due until 2022.

Environment Secretary Michael Gove, who is also running for the Conservative leadership, is prepared to offer free British citizenship to three million nationals who resided in the UK at the time of the June 2016 referendum, several newspapers reported Tuesday.