 The PLO backed the 1979 revolution, and several days after the revolution, PLO chief Yasser Arafat led a Palestinian delegation to Iran.The Palestinian delegates were publicly welcomed, and symbolically handed the keys to the former Israeli embassy in Tehran, which later became a Palestinian embassy.After the eruption of the second Palestinian intifada, in September 2000 after the collapse of Middle East peace talks at Camp David, Arafat released imprisoned Hamas and Islamic Jihad militants, a decision that restored the relations between Iran and the Palestinian National Authority.