QALQILYA, March 25, 2004 (WAFA)- Israeli Occupation Forces (IOF) arrested Thursday a number of civilians in the West Bank cities of Qalqilya and Bethlehem, security sources and witnesses said.... Security sources told WAFA that IOF troops rolled into the village, started a door-to-door search campaign, arrested Fathi Sawwan, 23, and led him to an unknown spot.... Moreover, IOF still constructing military0 checkpoints at the roads that link Qalqilya to Nablus, security sources added.... Elsewhere, IOF incurred into Aida refugee camp of Bethlehem and arrested two lads, according to security sources.... A convoy of fifteen Israeli military jeeps rumbled into the camp, stormed several houses, and arrested Ahmed Lutfi, 15, and Mohammed Abu Shanab, 15, and led them to an undisclosed location.... Witnesses told WAFA that IOF soldiers held several civilians and took them to an Israeli military post and severly beat them up....