The suspects, carrying forged identity cards, were arrested immediately and an initial investigation indicated they had links with the al-Qaida network, the source said on the party's Web site Moatamar Net. The source said security forces had rounded up several al-Qaida suspects within the past month.Yemen has undertaken a nationwide search for al-Qaida suspects ever since the Sept. 11, 2001 attacks on the United States, which resulted in the arrests of hundreds of people. Many who were not incriminated in terrorist attacks have been released after repenting and promising to abandon violence.