Israel insists that the barrier, including the encirclements, is necessary for security, designed to keep Palestinian suicide bombers and other attackers out.
Palestinians call it a land grab aimed at preventing them from setting up a state.
About one-quarter of the barrier is complete, in the northern section of the West Bank. Israeli officials say it has already prevented suicide bombings in the part of Israel opposite the barrier.
In another development, an Israeli military court on Sunday found an army captain guilty of negligence in the October 2002 killing of a Palestinian teenager who was studying in his house when he was hit by a stray bullet.
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