(AP Photo/Adel Hana)
GAZA CITY, Gaza Strip (AP) - Israel's military says ground forces are crossing the Gaza border in an escalation of Israel's week-old offensive against the territory's militant Hamas rulers.
Israeli TV channels are broadcasting images of troops marching into Gaza after nightfall. The military confirmed a ground operation was under way.
Defense officials say around 10,000 soldiers have massed along the border in recent days.
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