The call for discussions comes after the two South Korean marines were killed and 16 other soldiers hurt, some seriously, after the bombardment on the island of Yeonpyeong.
South Korea said around 200 North Korean artillery shells hit the island - in disputed waters - prompting Seoul to return fire.
But the communist state claimed its arch-rival fired first, after the North warned Seoul to halt military drills in the area.
US President Barack Obama has spoken out forcefully against North Korea after an artillery attack on a South Korean island killed two marines.
With North Korea pushing on with a nuclear enrichment programme, President Obama said that the global community must now address the problems on the Korean peninsula.