伊朗消息人士：原定周五举行的谈判已取消

Group 1 - The core viewpoint of the article is that the planned Iran-U.S. negotiations scheduled for June 6 in Oman have been canceled due to new conditions imposed by the U.S. side and existing disagreements between the parties [1] Group 2 - The cancellation of the talks is attributed to the U.S. imposing new conditions rather than issues related to the location of the negotiations [1] - There are significant differences in the negotiation topics between the two sides, which contributed to the cancellation [1]