Turkish Foreign Minister Ahmet Davutoglu continued making phone conversations over Iran's nuclear program.

Davutoglu spoke with U.S. President Barack Obama's National Security Advisor General Jim Jones and U.S. Special Envoy to Afghanistan and Pakistan Richard Holbrooke.

Davutoglu informed his counterparts about his impressions after talks with Iranian officials in Tabriz, diplomats stated.

Earlier, Davutoglu spoke with U.S. Secretary of State Hillary Clinton, German Foreign Minister Guido Westerwelle and British Foreign Secretary David Miliband.