Pakistan said it would help its neighbour hunt down the culprits. Iran, a mainly Shi'ite Muslim country, says the Sunni rebel group which claimed responsibility for the suicide attack operates out of Pakistan.
Iran has made arrests in connection with Sunday's suicide bombing that killed dozens of people near the border with Pakistan, it said on Wednesday.
Pakistan said it would help its neighbour hunt down the culprits. Iran, a mainly Shi'ite Muslim country, says the Sunni rebel group which claimed responsibility for the suicide attack operates out of Pakistan.
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