US President Joe Biden says he is "outraged and heartbroken" following Israel's killing of seven humanitarian aid workers in Gaza this week.
In a highly critical statement, the President said Israel had not done enough to protect aid workers and the investigation into their deaths "must bring accountability".
According to Israeli sources, the aid convoy hit in Gaza on Monday night was deliberately targeted by the Israeli Defence Forces, though they claim they thought it was something else.
It puts the continued provision of humanitarian aid in the enclave in serious jeopardy, with a number of NGOs suspending operations.
Tel Aviv correspondent Sarah Coates spoke to Ingrid Hipkiss.
