Israeli tanks and troops are massing on the border of Gaza, where it is thought the soldier is being held.Israeli Prime Minister Ehud Olmert has warned a large scale military operation is rapidly approaching.
"There really needs to be an effort now to try and calm the situation," Ms Rice told reporters en route to Pakistan.
Stark choices
Mr Olmert has refused to release any Palestinian prisoners in exchange for information about tank gunner Gilad Shalit.
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