Kuwait has recalled its ambassador to Iran in the latest episode of a regional diplomatic crisis following the execution of a prominent religious leader in Saudi Arabia, the official Kuwait News Agency reported.

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Tuesday's decision came after Saudi Arabia severed relations with Iran on Sunday after an attack on its embassy in Tehran following the kingdom's execution of Shia religious leader Nimr al-Nimr, who was put to death along with 46 other mostly Sunni convicts on terrorism charges.

Bahrain, Sudan and the UAE have rallied to Saudi Arabia's side, breaking off or downgrading relations with Iran in recent days.

Iran has accused Saudi Arabia of using the attack on the embassy as a pretext to fuel tensions.