Interpol has found new evidence showing that the number two suspect in connection with the alleged Iranian government's involvement in a plot to assassinate the Saudi ambassador to Washington is a key member of the Mojahedin Khalq Organization (MKO), Mehr News Agency reported.

Gholam Shakuri was last seen in Washington and Camp Ashraf in Iraq where MKO members are based.

The person in question has been travelling to different countries under the names of Ali Shakuri/Gholam Shakuri/Gholam-Hossein Shakuri by using fake passports including forged Iranian passports. One passport used by the person was issued on 30/11/2006 in Washington. The passport number was K10295631.

MKO started assassination of the citizens and officials after the Islamic revolution in a bid to take control of the newly established Islamic Republic. It killed several of Iran's new leaders in the early years after the revolution, including the then President Mohammad Ali Rajayee, Prime Minister Mohammad Javad Bahonar and the Judiciary Chief Mohammad Hossein Beheshti who were killed in bomb attacks by MKO members in 1981.

The MKO fled to Iraq in the 1980s, where it enjoyed the support of former Iraqi dictator Saddam Hussein and set up Camp Ashraf in the eastern province of Diyala, near the Iranian border. Over 3,000 MKO members are currently residing at the camp.

The U.S. designated the MKO a Foreign Terrorist Organization in 1997; the group is still on the list. Britain and the European Union took the group off their terrorist lists in 2008 and 2009 respectively after court rulings that found no evidence of terrorist actions after the MKO renounced violence in 2001.

The United States said last Tuesday it had uncovered a plot by two men with links to Iran's security forces to assassinate the Saudi ambassador to the United States, Adel al-Jubeir, by planting a bomb in a Washington restaurant. The Iranian government denies any involvement.

One of the men, who allegedly paid a U.S. undercover agent posing as a Mexican drug cartel hitman to carry out the assassination, has been arrested while the United States says the other is in Iran.