British PM says Labour under Corbyn threat to UK security

Prime Minister David Cameron said Sunday that veteran socialist Jeremy Corbyn's election to the Labour leadership made the main opposition party a threat to Britain's national security.

"The Labour Party is now a threat to our national security, our economic security and your family's security," he said on his personal Twitter account, in his first response to Corbyn's victory on Saturday.

The Conservative leader's comments mirror those made by Defence Secretary Michael Fallon on Saturday, and by the centre-right party itself.

Corbyn, a co-founder of the Stop the War anti-war movement, advocates unilateral nuclear disarmament, ending austerity and increasing public spending.

Cameron's Downing Street office issued a one-sentence statement Saturday on Corbyn's victory.

"The prime minister has spoken to Jeremy Corbyn, on the phone, to congratulate him on becoming the new leader of the opposition," it said.

Cameron will face Corbyn in parliament on Wednesday in the House of Commons' showpiece weekly session. The main opposition leader gets to fire six questions at the prime minister.