The announcement comes soon after a Washington summit at which Chinese President Hu Jintao and President Obama urge the two countries to resume dialogue. North Korea has reportedly agreed to discuss the March torpedo attack on a South Korean warship that killed 46 crew members.Signaling a possible diplomatic thaw following months of tension on the Korean peninsula, South Korea on Thursday agreed to hold high-level military talks with North Korea despite a November attack by the North that killed four people on a disputed South Korean island.