Israeli troops return to West Bank's Qalqilya

JERUSALEM (CNN) -- Israeli troops Tuesday rolled back into Qalqilya a few hours after pulling out and established a curfew once again in the West Bank town.

Israeli military sources said they received an alert that spurred the move. The army cautioned after the pullout that it reserved the right to return to the town and carry out raids or go on patrol.

Israeli forces are in seven of eight main Palestinian cities in the West Bank. Curfews were lifted briefly in Bethlehem and Hebron, the Israeli military said.

Israel said its policy of military incursions into Palestinian-controlled areas of the West Bank was meant to destroy the "infrastructure of terror." More than 200 Israelis have been killed in terror attacks since January 2002.

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The IDF said Tuesday that forces arrested Usama Tzalahat, who they say is an Islamic Jihad operative, during an operation Monday night in the village of Yatta near Hebron. The military said Tzalahat was planning to carry out a suicide attack, and authorities are questioning him. Palestinian sources had no immediate comment.

In Gaza, Palestinian sources said that six Palestinian policemen have been arrested in a village near Khan Yunes. No other details were available.

Also, Israel Radio is reporting a partial call-up of reservists, focusing on officers and commanders. It cited an IDF officer, who said that other soldiers will be called up by next week. Ha'aretz also reported that the IDF planned another round of call-ups.

The newspaper said that "the need for new call-ups is the damage being done to the army's training schedules because of the lengthy stay in the Palestinian areas."

Meanwhile, Assistant U.S. Secretary of State William Burns was to meet Tuesday in London with other members of the so-called Madrid quartet involving U.S. policy on the Middle East. The group includes representatives from the United States, United Nations, Russia and European Union.

The Bush administration has called for new Palestinian leadership after the White House said it received intelligence that Palestinian Authority President Yasser Arafat was continuing to support terror groups. Arafat and other Palestinian leaders have denied allegations that they support terror.