The conflict underscored the distance between world powers over the United States’ pressure campaign on Iran. By Michelle NicholsUNITED NATIONS, Sept 17 (Reuters) - Russia and China ended on Thursday a United Nations Security Council mandate for the independent monitoring of international sanctions on Iran, reviving their argument that allUNmeasures on Tehran had been removed under a nuclear deal with world powers.All UN sanctions on Iran were reimposed a year ago after France, Britain and Germany accused Tehran of violating the 2015 nuclear pact meant to prevent it from developing a nuclear weapon. Key points and original sources are listed below.

• The conflict underscored the distance between world powers over the United States’ pressure campaign on Iran.S1

• By Michelle NicholsUNITED NATIONS, Sept 17 (Reuters) - Russia and China ended on Thursday a United Nations Security Council mandate for the independent monitoring of international sanctions on Iran, reviving their argument that allUNmeasures on Tehran had been...S2