Iran stops doing business with Saudi Arabia as Nimr execution rankles

A row has been raging for days between Shi'ite Muslim power Iran and the conservative Sunni kingdom since Saudi Arabia executed cleric Nimr al-Nimr, an opponent of the ruling dynasty who demanded greater rights for the Shi'ite minority.

Saudi Arabia, Bahrain, Sudan, Djibouti and Somalia have all broken off diplomatic ties with Iran this week, the United Arab Emirates downgraded its relations and Kuwait, Qatar and Comoros recalled their envoys after the Saudi embassy in Tehran was stormed by protesters following the execution of Nimr and 46 other men.