Climate campaigner Greta Thunberg and other 11 activists set sail on Sunday afternoon for Gaza on a ship aimed at “breaking Israel’s siege” of the devastated territory, organizers said.

The Hamas-run health ministry says more than a hundred people were injured in the attack. The aid distributor said the reports were "false".

The Israeli military is again advancing into Gaza and has blocked most aid, causing widespread hunger. A new but widely criticized system for getting in relief started operating last week.

Dozens were feared dead and scores wounded Sunday after the Israel Defense Forces opened fire on a group receiving food from a collection point in the Gaza Strip, according to hospital officials and witnesses on the ground. The reports were vigorously denied by the organization charged with distributing aid.

A watchdog claims the U.K. warned of Hamas links in a Gaza aid program. The U.K. denies funds went to Hamas-run agencies, but critics call for greater transparency.

Former Israeli Prime Minister Ehud Olmert condemned the "thugs" in the government of current Prime Minister Benjamin Netanyahu on Sunday, doubling down on his accusation that they are committing "war crimes" against Palestinians in Gaza.