South Korea, the United States and Japan are considering holding a trilateral meeting of their foreign ministers in Vancouver, Canada, next week on the sidelines of an international gathering aimed at discussing more effective sanctions on North Korea, a diplomatic source here said Friday.

“There is a possibility of a trilateral foreign ministerial meeting during the meeting of the Vancouver Group, as all foreign ministers from South Korea, the US and Japan are scheduled to attend it,” the source said. “Further discussion is needed to fix details regarding schedule.”

The meeting in Vancouver, slated for Monday and Tuesday in the Canadian city, will bring together the top ministers of countries that sent their troops to fight alongside the South during the Korean War. The meeting will discuss how to boost the effectiveness of sanctions on the North.