Israeli forces fired on a United Nations convoy carrying vital food supplies in central Gaza on February 5, before ultimately blocking the trucks from progressing to the northern part of the territory, where Palestinians are on the verge of famine, according to documents shared exclusively by the UN and CNN’s own analysis.

CNN has seen correspondence between the UN and the Israeli military that show the convoy’s route was agreed upon by both parties prior to the strike. According to an internal incident report compiled by UNRWA, the main UN relief agency in Gaza, which was also seen by CNN, the truck was one of 10 in a convoy sitting stationary at an IDF holding point when it was fired upon.

No one in the convoy was hurt, but much of its contents – mainly wheat flour desperately needed to bake bread – were destroyed. Tracing the strike offers a window into the major challenges that humanitarian efforts face in getting aid to Gaza’s more than 2 million people – nearly 85% of whom are internally displaced – amid Israel’s nearly five-month bombardment of the strip.