White House says it has not received specific commitments from Iran in nuclear talks

WASHINGTON, April 1 (Reuters) - The White House said onWednesday that it has not received tangible, specificcommitments from Iran over its nuclear capabilities asinternational negotiations for a political framework for such anagreement continue past its Tuesday deadline. White House spokesman Josh Earnest said the talks continueto be productive, but that there are gaps that still remain. He also said the United States is prepared to walk away fromthe negotiations if necessary. (Reporting by Juli