U.N. Secretary-General Antonio Guterres said on Friday that the world body has not been able to independently corroborate that the cruise missiles and drones used in attacks this year on an airport and oil facilities in Saudi Arabia "are of Iranian origin."
Guterres also said the U.N. can't say if they were transferred from Iran "in a manner inconsistent" with a U.N. resolution that endorsed the 2015 nuclear deal between Iran and six key countries.
The United States has blamed Iran for the attacks. The Saudis said the missiles and drones were Iranian but stopped short of accusing Iran of firing them.