U.S. Secretary of State John Kerry said on Tuesday there was "no discrepancy" between the United States and Turkey with regard to the strategy for fighting ISIS militants trying to take over a Kurdish town in Syria near the Turkish border.Kerry also said that he and his Russian counterpart Sergei Lavrov have agreed to step up intelligence sharing over ISIS and he said to his Russian counterpart that "we intensify intelligence cooperation with respect to ISIS and we agreed to do so,"Despite a deadlock in talks just six weeks before a final accord is due, Kerry said he believed a nuclear deal with Iran was still in sight."I don't believe it's out of reach, but we have some tough issues to resolve," Kerry said of the deal meant to reduce fears Iran's nuclear programme could be used to make atomic weapons, in exchange for lifting harsh Western economic sanctions.