Riyadh has not provided enough proof that it should be permanently removed from the UN blacklist over killing Yemen children, UN diplomatic sources said on Monday.

Riyadh has not provided enough proof that it should be permanently removed from the UN blacklist over killing Yemen children, UN diplomatic sources said on Monday.

UN officials plan to travel to Riyadh to obtain more details on various issues, such as rules of engagement, one of the sources said.

A UN annual report on children and armed conflict said the coalition was responsible for 60 percent of child deaths and injuries in Yemen last year, killing 510 and wounding 667. The Saudi-led coalition includes United Arab Emirates, Bahrain, Kuwait, Qatar, Egypt, Jordan, Morocco, Senegal and Sudan.

UN Secretary-General Ban Ki-moon temporarily removed the coalition from the blacklist - contained in an annex to the report - on June 6 pending a joint review after Saudi Arabia, a key UN donor, threatened to cut funding to the world body.

Ban is to brief the UN Security Council on the report on Tuesday. He plans to tell the 15-member council that the United Nations will continue to work with Saudi Arabia on the issue and reinforce that only the blacklist is under review, not the substance of the report, a UN diplomatic source said told Reuters news agency.

In a rare move, Ban - who steps down at the end of the year after a decade in the top UN job - publicly slammed Saudi Arabia for exerting unacceptable pressure on the world body over the children and armed conflict report. Diplomatic sources told Reuters in June that Riyadh suggested a fatwa - an Islamic legal opinion - could be placed on the world body.

"He came out of this bruised and unhappy," said a second UN diplomatic source, speaking on condition of anonymity.

Ban has since met with Saudi Deputy Crown Prince Mohammed bin Salman and Saudi Foreign Minister Adel al-Jubeir. Two weeks ago Saudi Arabia sent a letter that diplomatic sources said did not address UN concerns about the risks to children in Yemen and was described by one source as "superficial."

A second letter received by the United Nations last Thursday "does not address yet all of our concerns, but is good enough to continue with the joint evaluation," said one of the diplomatic sources, speaking on condition of anonymity.

"They are willing to continue to be engaged, they formally accept international humanitarian law, and give all sorts of info useful to avoid and prevent future incidents affecting children," said the source.

Yemen has been since March 26, 2015 under brutal aggression by Saudi-led coalition.
Thousands have been martyred and injured in the attack, with the vast majority of them are civilians.

Riyadh launched the attack on Yemen in a bid to restore power to fugitive ex-president Abd Rabbu Mansour Hadi who is a close ally to Saudi Arabia.