Iranian authorities said Rigi who headed the militant group Jundollah was captured on a flight from Dubai to Kyrgyzstan.
A suicide vehicle 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.
"The suicide attacker set off the explosion after stopping at police headquarters in Chabahar".
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.More news: Kylie Jenner's Latest Instagram With Travis Scott Is Raising Eyebrows
Images posted online showed thick smoke rising from the sky in the area where the incident took place.
A number of Iranian media have reported a vehicle explosion in the largest port city in Sistan-and-Balochistan province, Chabahar.
State television broke into its regular broadcast to report the attack, as such assaults are rare in the Islamic Republic of Iran.
In 2010, two suicide bombers killed at least 28 people, including some of the elite Revolutionary Guards, at a Shi'ite mosque in southeast Iran, an attack Iranian leaders said was backed by the United States.More news: Police launch coordinated raids on Italian mafia in Europe
Meanwhile, Iranian Foreign Minister Mohammad Javad Zarif claimed that those behind the attack were backed by foreign countries and would be brought to justice.
Iran has stepped up security in border areas after gunmen in September opened fire on a military parade in Iran's southwestern city of Ahvaz, killing 25 people, nearly half of them members of Iran's elite Revolutionary Guards corps.
Chabahar city is around 100 km from Iran's border with Pakistan.More news: Sandra Oh and Andy Samberg to host Golden Globe ceremony