North Korea Wednesday, warned the South Korean president “to watch her tongue” or she will “meet a miserable ruin,” in response to the South’s call to abandon nuclear programs.

The warning came as the tension in the Korean peninsula escalated Tuesday with Pyongyang declaring of “entering the final stage of the all-out showdown with the U.S.,” and Washington and Seoul stating they are ready to face any contingency from the North.

Reacting to Park Geun-hye, South Korea's first female president’s warning to the North to abandon its nuclear missile, Pyongyang said her act was an “unpardonable provocation... And she should behave with discretion.”

"The owner of Cheongwadae (South Korea's presidential office) had better... watch her tongue," North Korea's official KCNA news agency quoted a spokesman for the Committee for the Peaceful Reunification of Korea as saying.

Park in her speech Tuesday, marking the third anniversary of the sinking of a South Korean naval vessel along with its 46 sailors allegedly torpedoed by a North Korean submarine – a charge that North denies – had told Pyongyang to “change course.”  

Reacting sharply to Park’s speech, spokesman for the North Korean committee said: "The present chief executive of South Korea made invectives slandering the DPRK."

"If she keeps to the road of confrontation like traitor Lee, defying the warnings of the DPRK (North Korea), she will meet a miserable ruin," he said.

North’s regime has been highly critical of Park’s predecessor, Lee Myung-bak, and had regularly attacked him with vitriolic language. Pyongyang had also expressed its displeasure over Park and had reportedly used an abusive Korean term to describe her actions.

"We have already seriously warned against the venomous swish of skirt," it said referring to Park. Swish of skirt is a derogatory phrase used to criticize women who appear bossy and over bearing, AFP noted.

North, furious over the U.S. support to the South Korea and the ongoing military drills by the allies accused the U.S. of seeking a nuclear war in the Korean peninsula.

In a letter to the United Nations Security Council Tuesday, Pyongyang referred the situation in the peninsula as “grave.”

“A nuclear war in the Korean Peninsula is no longer a presentative meaning but realistic one,” it said in a statement released by the Korean foreign ministry to KCNA news agency.  

It said the “Korean Peninsula is now in a touch-and-go situation due to the nuclear war provocation moves of the U.S. and South Korean puppets."

“The DPRK army and people that have become one with the Supreme Command are entering the final stage of the all-out showdown with the U.S. to defend the country's sovereignty and the nation's dignity by dint of the power of Songun they have long bolstered up,” the statement said. 

Pyongyang cuts military hotline with S. Korea

In another development, North Korea said Wednesday it is cutting a military hotline with the South Korea, BBC news reported. The hotline is used to facilitate cross-border travel to a joint industrial complex in Kaesong.    

North Korea's chief delegate to inter-Korean military made the announcement Wednesday in a statement sent to his South Korean counterpart. 

The hotline link is important as it affects the travel of hundreds of workers from both countries, who travel to the industrial complex daily.

Recently, North Korea had severed a Red Cross hotline between the two nations in retaliation against the joint military drills by the South and the U.S.

In March 2009, North Korea had cut off the military line for a week protesting over the annual military drills by the U.S. and South Korea.