The security forces had noticed suspicious movements of four citizens and one of the expatriates, and with the grace of Almighty Allah, these suspects were arrested in Riyadh on Monday, Jan 16, 2006, said an official source at the Interior Ministry yesterday. 'When one of their sites was searched, integrated devices and equipment for forging documents, a laboratory for manufacturing pipe bombs and explosive materials in addition to electronic devices, whose contents expose the belonging of these suspects to the deviant group as well as criminal plans for carrying out malicious operations inside the Kingdom of Saudi Arabia were found," the official source added.