More than 100 people were killed in northern Gaza where Israeli troops opened fire Thursday, triggering panic as hungry Palestinian civilians were gathering around food aid trucks, Palestinian officials and eyewitnesses said.CNN is unable to independently confirm the death toll, and the Israeli military has given a different account of the circumstances.What we know: The carnage unfolded early Thursday when a group of trucks carrying desperately needed aid arrived at Haroun Al Rasheed Street in western Gaza City, in the Sheikh Ajleen neighborhood. People had swarmed around the newly…