South Korea showed off a new cruise missile on Thursday that defense officials say has the ability to strike "anywhere at anytime" in North Korea.
Seoul's military is on a heightened state of alert after North Korea's latest nuclear test, which prompted international condemnation and raised tensions on the Korean peninsula.
Defense Ministry spokesperson Kim Min-seok touted the pinpoint accuracy of the missile, which he says has now been officially deployed.
"The cruise missile we will show the public today is an extremely accurate weapon that can target precise targets - such as windows of a North Korean command office - anywhere in the Korean peninsula. It is extremely destructive and powerful and will restrict the enemy in case South Korea is threatened."
The Defense Ministry did not specify the exact range of the missile, but released footage of it being launched from a submarine and destroyer and hitting precision targets on land.
South Korea reached a deal last year with the United States to expand the range of its ballistic missiles - a move Seoul says is necessary to counter the growing threat of Pyongyang's weapons.
Washington has reassured its allies in the region of its commitment to their security following North Korea's nuclear test on Tuesday. President Barack Obama pledged protection under the U.S. "nuclear umbrella" during a telephone call Wednesday with Japanese Prime Minister Shinzo Abe.
The White House says the two leaders are working together to seek strong action against North Korea at the United Nations Security Council, which has already unanimously condemned the test.
Secretary of State John Kerry said earlier Wednesday a "strong and credible" international response is necessary. He said failure to respond firmly risks damaging the credibility of global nonproliferation efforts.