At least three people died and 24 others were injured in a suicide auto bomb attack on the police headquarters in Iran's southeast on Thursday, state media reported, adding that the perpetrator was killed.
Mohammad Hadi Marashi, the deputy governor in charge of security, said the assailants tried to enter the city's police headquarters but "they were prevented by the guards and they detonated the vehicle bomb".
State TV also showed footage of smoke rising over the city.
Press TV quoted Rahmdel Bamari, governor of Sistan and Balochestan province, as saying that an "explosive-laden vehicle" targeted the police post on Thursday.
There was no immediate claim of responsibility for the attack.
Sistan-Baluchistan province, where the bombing hit, has always been a flashpoint, with a number of attacks reported in recent past.
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Ansar al-Furqan, a Sunni jihadi group, clamed credit for the attack. Reuters could not verify the authenticity of the videos.
State authorities did not identify who was behind the attack.
That attack was claimed by a Sunni Muslim group called, Jundallah, also known as Soldiers of God.
Chabahar, near Iran's border with Pakistan on the Sea of Oman, is home to a newly built port and is an economic free zone.
Mohammad Pakpur, the commander of the ground forces of Iran's Islamic Revolutionary Guards Corps (IRGC) said the attack had failed. Another coordinated June 7, 2017 IS group assault on parliament and the shrine of Ayatollah Ruhollah Khomeini, the leader of Iran's 1979 Islamic Revolution, killed at least 18 people and wounded more than 50.