(Reuters) – A Saudi Arabia-led military coalition has asked the United Nations to reveal details on the sources of information that led the world body to briefly blacklist it for maiming and killing children in Yemen and invited U.N. experts to come to Riyadh. The demand was included in a letter from Saudi Ambassador Abdallah Al-Mouallimi to U.N. Secretary-General Ban Ki-moon on the coalition’s behalf dated June 8 and seen by Reuters on Tuesday.