Tehran:
Iran summoned Islamabad's envoy to Tehran over Sunday's deadly bombing against the nation's Revolutionary Guards, claiming those behind the attack had used Pakistani soil as a springboard, the ISNA news agency said.
It said the foreign ministry had called Pakistan's charge d'affairs and "expressed Tehran's regret to Pakistan's envoy (that) members of the terrorist group involved in the incident entered Iran through Pakistan."
The ministry also "protested against the use of Pakistani territory by the terrorists and rebels against the Islamic Republic of Iran and urged Pakistani authorities to act firmly to prevent the movement of those terrorists and rebels in their country."