The U.N. Security Council convened a closed-door meeting on Wednesday to review the implementation of sanctions against North Korea.

The council was initially set to discuss an 81-page report drafted by a U.N. panel of experts on sanctions on the North, but the report wasn’t submitted due to opposition from China.

The report apparently raised allegations that the North is exporting ballistic missiles, missile parts and related technology to countries in the Middle East and South Asia.

According to AFP, the report has also alleged that North Korea and Iran regularly traded items related to ballistic missiles via their flag carrier airlines, Air Koryo and Iran Air.

The AFP added that the report mentioned that the prohibited materials were moved from the North through a "neighboring third country.” AFP quoted diplomats as saying that China was the country that was not named in the report and that is likely the reason a Chinese representative on the U.N. panel of experts refused to sign it.

Western countries that attended Wednesday’s meeting apparently expressed concerns over China’s move, saying that such a move had undermined the effectiveness of U.N. sanctions on Pyongyang.