American contractors guarding aid distribution sites in Gaza are using live ammunition and stun grenades as hungry Palestinians scramble for food, according to accounts and videos obtained by The Associated Press.

Two U.S. contractors, speaking to the AP on condition of anonymity because they were revealing their employers’ internal operations, said they were coming forward because they were disturbed by what they considered dangerous and irresponsible practices. They said the security staff hired were often unqualified, unvetted, heavily armed and seemed to have an open license to do whatever they wished.

They said their colleagues regularly lobbed stun grenades and pepper spray in the direction of the Palestinians. One contractor said bullets were fired in all directions — in the air, into the ground and at times toward the Palestinians, recalling at least one instance where he thought someone had been hit, Associated Press reported.