Iranian negotiators in nuclear talks with world powers must respect Tehran's "red lines", top decision-maker and supreme leader Ayatollah Ali Khamenei said Wednesday. "I am not interfering in the details of these negotiations but there are red lines and limits that must be respected," Khamenei said in remarks broadcast live on state television. "I have told the officials that they must respect these limits, and not fret about the hullabaloo of the enemies and those opposed (to Iran)," he said.