Yen hits 160 per dollar, traders on alert for intervention Strikes in Middle East continue as U.S.-Iran peace talks in limbo Dollar underpinned by safe-haven demand; bitcoin hits two-month low LONDON, June 3 (Reuters) - Renewed strength in the dollar pushed the Japanese yen back to the key 160 level on Wednesday, prompting verbal warnings from authorities and keeping traders on alert for intervention, as fresh Gulf hostilities bolstered demand for the greenback.