Mohammad Ali Rajai (محمد علی رجائی in Farsi) (15 June 1933 – 30 August 1981) was the second elected President of Iran, after serving as Prime Minister under Abolhassan Banisadr. He was also Minister of Foreign Affairs from 11 March 1981 to 15 August 1981, while he was Prime Minister. He was assassinated in a bombing of the presidency on August 30, 1981, along with prime minister Mohammad Javad Bahonar.
Mohammad-Ali Rajai was born on 15 June 1933 in Qazvin, Iran. His father, Abdulsamad, died when Mohammad-Ali was only 4 years old, after which he lived with his mother and brother. Rajai grew up in Qazvin, and moved to Tehran in 1946. After moving to Tehran, he had a close relationship with the anti-Shah groups and parties. He known with Ayatollah Mahmoud Taleghani. In 1958, He moved to Bijar to be educated, but after a year, he moved to Tehran and graduated with a degree in Education from Tarbiat Moallem University in 1959. He was arrested by the Shah's government in 1974, but was set free after four years.
He was actively involved in the Iranian revolution and was a leader in the movement to purge Iranian universities of American and European influences, which was later called the Cultural Revolution.
After the Iranian Revolution, he became Minister of Education in the Government of Mehdi Bazargan, and although Bazargan's Cabinet resigned in 6 November 1979, Raja did not resign and remained a minister until 12 August 1980, when he became prime minister. When Bani Sadr became the president of Iran in the first presidential election, he had to nominate a new prime minister, and after 5 months, he nominated Rajai for the position, and parliament voted him in. He was in office until August 2, 1981, when he became second president of Iran.
Banisadr was impeached in 22 June 1981 by parliament, and Khomeini held a Provisional Presidential Council by 6 people. Rajai was one of them. He nominated himself for the presidential election in 1981. He became the second president and first president from Islamic Republican Party after winning 91% of the vote. He officially became president after Oath of Office in 2 August 1981. [1] On August 30, 1981, President Rajai held a meeting of Iran's Supreme Defense Council, along with the Prime Minister Mohammad Javad Bahonar. Witnesses later stated that a trusted aide brought a briefcase into the conference room, set it between the two leaders, then left. Another person opened the case, triggering a bomb that set the room ablaze and killed Rajai, Bahonar, and three others. The assassin was identified as Massoud Kashmiri, an operative of the People's Mujahedin of Iran (also known as the MKO, MEK and PMOI), who had infiltrated the Prime Minister's office in the guise of a state security official.

Hojatoleslam Mohammad Javad Bahonar (محمدجواد باهنر in Persian) (1933 – August 30, 1981) was the third prime minister of Iran following the 1979 revolution, and the secretary-general of the Islamic Republican Party.He was the first cleric person to be Iran's Prime Minister.
Bahonar was born in Kerman, Iran. He was a cleric who was imprisoned for anti-government activities during the 1960s. However, he had not been active in politics for a long time before the Revolution, but was co-authoring textbooks in Islamic studies.
It was only after the revolution that he became a founding member of the Islamic Republic party and an original member of the Council of Revolution of Iran. He was chosen as the Minister of Culture and Islamic Guidance under Mohammad Ali Rajai's prime ministry in March 1981, and continued efforts to purge Iranian universities of secular influences, in what became known as the Islamic Cultural Revolution.
When Rajai became President on August 4, 1981, he chose Bahonar as his prime minister.
After Mohammad Beheshti was assassinated on June 28, 1981, Bahonar became the secretary-general of the Islamic Republic party, but he didn't last long in that position, nor in the position of Prime Minister, as he was assassinated after less than two months in these offices, along with Rajai and other party leaders, when a bomb exploded at his office in Tehran. The assassin was identified as Massoud Kashmiri, an operative of The People's Mujahedin of Iran (also known as the MKO, MEK and PMOI), who had infiltrated the Prime Minister's office in the guise of a state security official.

en.wikipedia.org/wiki/Mohammad-Ali_Rajai

en.wikipedia.org/wiki/Mohammad-Javad_Bahonar