A Syrian security official, speaking on condition of anonymity, said the government forces arrested 40 terrorists on Monday as they attempted to enter Syria, Fars News Agency reported on Sunday.
The unnamed official added that five of the detainees were identified as MKO members following a full-scale investigation into the capture.
The report comes as Iraqi and Syrian security officials maintain that a large number of MKO members have entered Syria over the past few days.
The officials have also warned against MKO’s training of terrorists in Turkey as well as the semi-autonomous Kurdistan region in northern Iraq.
Director of Iran's Habilian Association Seyyed Mohammad Javad Hasheminejad had announced on May 28 that the MKO is preparing to launch a massive terrorist operation in Syria.
Syria has been experiencing unrest since mid-March 2011, with many people, including large number of security forces, killed in the turmoil.
While the West and the Syrian opposition accuse the government of the killings, Damascus blames outlaws, saboteurs and insurgents for the unrest, insisting that it is being orchestrated from abroad.