The meeting will be presided over by US Secretary of State Rex Tillerson, who has invited the foreign ministers from council member states and others involved in the North Korea issue. Yun was invited as the minister of a stake-holding country.

He will be given a chance to speak to the gathering for a few minutes. His speech is expected to focus on issues related to the North's denuclearization.

Preparations are also under way to arrange meetings on the sidelines between Yun and his counterparts from other countries including Tillerson, the source added.

The UNSC meeting comes amid speculation that the North might conduct an additional nuclear test. Tensions remain high, sparked by the North's continued saber-rattling and the US' threat to use all options including military action.

The North conducted two nuclear denotation tests and more than 20 ballistic missile launches last year alone in violation of multiple UNSC resolutions. (Yonhap)