By Parisa Hafezi and Elwely ElwellyDUBAI, Aug 12 (Reuters) - Iran and the United States remain at loggerheads over efforts to agree a permanent end to the war in the Gulf, according to a senior Iranian source who said there had been no progress in talks to revive the interim deal agreed in June and define a timeframe to implement it.The comments were a further blow to hopes of a swift resolution to the crisis, following attacks on shipping in the region on Tuesday that pushed oil prices higher.

“As long as the American violation of the Memorandum of Understanding continues and the US does not make amends for its violations, there is no possibility of resuming…

Oil prices surge as talks stall over competing demands, hampering prospects for reopening crucial strait.