At least 67 Palestinians were killed by Israeli fire as they waited for U.N. aid trucks in northern Gaza on Sunday, the Gaza health ministry said, as Israel issued new evacuation orders for areas packed with displaced people.

The ministry said dozens of people were also wounded during the incident in northern Gaza. It was one of the highest reported death tolls among repeated recent cases in which aid seekers have been killed, including 36 on Saturday. Another six people were killed near another aid site in the south, it said.

Israel's military said its troops had fired warning shots towards a crowd of thousands of people in northern Gaza on Sunday to remove what it said was "an immediate threat."