He was referring to the capture, trial and subsequent execution in June 2010 of Abdolmalek Rigi, the leader of militant group Jundallah who had waged a deadly insurgency in Sistan-Balochistan.
At least three people were killed in a bomb attack in Iran's southeastern port city of Chabahar on Thursday, state TV reported, adding that many others were injured. Middle East Eye could not verify the authenticity of the videos.
Sistan-Baluchistan province, where the bombing hit, has always been a flashpoint, with a number of attacks reported in recent past.
Authorities did not identify who was behind the attack, but Iranian media initially blamed the attack on Ansar al-Furqan, a Sunni jihadi group.
The bomber drove his vehicle, loaded with explosives, up to the police headquarters, provincial official Rahmdel Bameri told state TV.
Last year, in the first deadly assault claimed by Islamic State in Tehran, 18 people were killed at the parliament and mausoleum of Ayatollah Ruhollah Khomeini, founder of the Islamic Republic.
An Iranian ethnic Arab separatist Sunni militant group and Islamic State both claimed responsibility for that attack.
A Policeman Died in Bulandshahr, But Adityanath's Focus Is Only on Cows
The crowd also torched a police outpost, police jeeps and a few private vehicles during the violence, Kumar said. Adityanath has now left Uttar Pradesh and is busy campaigning for the Bharatiya Janata Party in other states.
In 2010, two suicide bombers killed at least 28 people, including some of Iran's elite Revolutionary Guards, at a mosque in southeast Iran; an attack Iranian leaders said was backed by the United States.
It hosts the operation of a joint port project between Iran and India.
"Mark my words: Iran WILL bring terrorists & their masters to justice", the foreign minister emphasized.
Iran also says that militant groups are sheltering across the border in Pakistan and has threatened to attack their bases if Islamabad does not confront them.
Meanwhile, Foreign Ministry spokesman Bahram Qassemi also denounced the "malicious and inhumane terror attack, which he said was aimed at disrupting Iran's economic development, which is underway in cooperation with regional states".
India has said it is ready to invest up to $500m in the development of the port that is key to its ambitions to chart a route to landlocked Central Asian countries and Afghanistan, bypassing Pakistan.