"Afghanistan terror bombings another instance of depth of Daesh depravity: Shia and Sunni are both victims & must unite to defeat extremists," Zarif tweeted yesterday, using another name for IS.
Foreign ministry spokesman Bahram Ghasemi added that "eradicating this unfortunate phenomenon (IS) wouldn't be possible without a joint cooperation and understanding among all countries".
The "inhumane and un-Islamic" attacks were "unjustifiable anywhere," he added.
IS claimed responsibility for the blasts, which hit during a huge protest in Kabul, and which were the deadliest attacks there since 2001.
Iran, a country with a large Shiite majority, has a long border with Afghanistan, where the minority Hazara Shiites were bombed yesterday.
