A suicide auto bomber attacked a police headquarters in the southeastern Iranian port city of Chabahar on Thursday, killing at least three people and wounding several others, state TV reported.
Chabahar lies in Sistan-Balochistan province which has always been a flashpoint.
"The terrorists exploded a auto carrying explosives at the gate of the [police] headquarters", Bameri was quoted as saying by the official government news agency IRNA.
Chabahar city governor Rahmdel Bameri said many people were also wounded in the 10 am (0630 GMT) attack.
The report went on to say that shooting could also be heard in the city.
Chabahar lies in Sistan-Baluchistan province which has always been a flashpoint, with Pakistan-based Baluchi separatists and Sunni Muslim extremists carrying out cross-border attacks targeting the Shiite authorities.More news: UN Security Council meets over Iran ballistic missile launch
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In an online communique, the Sunni jihadist group Ansar al-Furqan claimed responsibility for the attack, according to the Washington-based SITE Intelligence Group, which monitors online extremist activity.
Chabahar lies some 100 kilometres (60 miles) west of the Pakistan border and is home to a large, mainly Sunni Muslim ethnic Baluchi community which straddles the two countries.
Videos posted on Twitter, purportedly from Chabahar, showed thick smoke rising from the area.
Arab separatists and the militant Islamic State (IS) group both claimed the assault.
"India strongly condemns today's despicable terrorist attack in Chabahar, Iran".
On June 7, 2017 another co-ordinated Islamic State group attack 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.