Fifteen-year-old Palestinian Mahmoud Jamal Al-Attar set out to collect food from an Israeli-controlled distribution site in southern Gaza one day in August, but like many others, he never made it back; he died after being shot in the chest.

The teenager is among hundreds of Gazans killed near aid hubs run by the Gaza Humanitarian Foundation (GHF), a private Israeli and U.S.-backed outfit set up in May that bypasses the U.N. coordinated system that has long supported the enclave.

The shootings have been widely blamed on Israeli forces outside the aid sites. A GHF spokesperson said its armed contractors had not used lethal force.