Just in from [1] AP:

GAZA CITY, Gaza Strip - Israeli planes attacked three bridges in central Gaza, the military said Wednesday, and Israeli tanks were on the move after the government approved a limited operation — a response to a weekend Palestinian attack in which two soldiers were killed and a third captured.

The Israeli military said in a statement that the object of the attacks on the bridges late Tuesday and early Wednesday was "to impair the ability of the terrorists to transfer the kidnapped soldier." Knocking down the bridges would cut Gaza in two, Palestinian security officials said.

Israeli military officials said Prime Minister Ehud Olmert approved a "limited operation" for southern Gaza, aimed at "terrorist infrastructure." The officials spoke on condition of anonymity because they were not authorized to talk to reporters.