At least 50 people have been killed in clashes between Iraqi security forces and members of the terrorist Mujahedin - e Khalq Organization(MKO) in the eastern province of Diyala.Iraqi officials and the terrorist MKO members gave conflicting reports about the clashes and explosions that took place at Camp New Iraq on Sunday. The MKO said the security forces raided the camp early on Sunday, killing more than 50 of its members. The group said Iraqi forces set fire to property inside the camp. The Iraqi government has denied any involvement. Officials said MKO members attacked an army brigade responsible for the camp after the incident, killing four Iraqi soldiers and injuring four others. Ali al-Moussawi, a spokesman for Iraqi Prime Minister Nouri al-Maliki, confirmed that some MKO members had been killed, but said the deaths were the result of infighting among the camp residents. The MKO -- listed as a terrorist organization by much of the international community -- fled Iran in 1986 for Iraq, where it enjoyed the support of Iraq's executed dictator, Saddam Hussein, and set up its camp near the Iranian border. In December 2011, the United Nations and Baghdad agreed to relocate some 3,000 MKO members from Camp New Iraq, formerly known as Camp Ashraf, to Camp Liberty -- a former US military base near Baghdad International Airport. The group is notorious for carrying out numerous acts of terror against Iranian civilians and officials, involvement in the 1991 bloody repression of Shia Muslims in southern Iraq, and the massacre of Iraqi Kurds in the country's north under Saddam. Tehran has repeatedly called on the Iraqi government to expel the terrorist group, but the US has been blocking the expulsion by pressuring the Iraqi government.