"Investigations showed that the explosion was caused by a handmade explosive device, which led to a bomb squad being dispatched to the location who found a suspicious package," said the provincial police chief, Mohammad Ghanbari. "The second bomb detonated before being defused and lightly injured three police forces," he said, quoted by the Tasnim news agency.
Police are currently trying to identify and arrest the perpetrators. The jihadist group Jaish al-Adl (Army of Justice), which is blacklisted as a terrorist group by Iran, claimed responsibility for the bombings on social media.