Iran has vowed to take international legal action against Saudi Arabia over the killing of 769 people in a stampede at this year's Haj, in which 136 Iranians died.
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According to ABC News, Saudi Arabian Foreign Minister Adel Al-Jubeir later responded to Iran's criticism saying that "the Iranians should know better than to play politics with a tragedy".
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Iranians comprise the largest group of casualties identified so far in the tragedy.
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Iran and Saudi Arabia are bitterly divided on a host of regional issues and support opposite sides in the wars raging in Syria and Yemen.