South Korea has walked back on a proposal to lift some of its unilateral sanctions against North Korea following President Donald Trump's blunt response.

Foreign Minister Kang Kyung-wha had said on Wednesday that Seoul was considering lifting measures applied after a deadly attack in 2010. She cited the intent to create more diplomatic momentum with the North, but Trump reacted by saying Seoul could "do nothing" without Washington's approval.

Unification Minister Cho Myoung-gyon said Thursday removing the sanctions has not been seriously considered and would be hard to do unless North Korea acknowledges responsibility for the 2010 attack. North Korea has fiercely denied it sunk the Cheonan warship, an attack that killed 46 South Korean sailors.

South Korean Unification Minister Cho Myoung-gyon listens to lawmaker's question at the National Assembly in Seoul, South Korea, Thursday, Oct. 11, 2018. South Korea has walked back on a proposal to lift some of its unilateral sanctions against North Korea following President Donald Trump’s blunt response. (AP PhotoLee Jin-man)

South Korean Unification Minister Cho Myoung-gyon listens to lawmaker's question at the National Assembly in Seoul, South Korea, Thursday, Oct. 11, 2018. South Korea has walked back on a proposal to lift some of its unilateral sanctions against North Korea following President Donald Trump’s blunt response. (AP PhotoLee Jin-man)

Lifting the South's sanctions would have little effect since U.S.-led international sanctions remain.