Iran, US narrow differences after Pakistani mediation but splits remain, senior Iranian official says

DUBAI, April 16 (Reuters) - Iran and the United States have made some progress as they push for an agreement under Pakistani mediation, but more than halfway through a two-week truce big splits remain including over Tehran's nuclear ambitions, a senior Iranian official said on Thursday."The trip of the Pakistani army chief to Tehran was effective in reducing differences in some areas, but fundamental disagreements still remain in the nuclear field.... More hopes have been created for extending...