A controversial humanitarian organization backed by the United States and Israel did not distribute any food aid on Saturday, accusing Hamas of making threats that "made it impossible" to operate in the enclave, which the Palestinian militants denied, Reuters reported.

The Gaza Humanitarian Foundation, which uses private U.S. security and logistics firms to operate, said it was adapting operations to overcome the unspecified threats. It later said in a Facebook post that two sites would reopen on Sunday.

A Hamas official told Reuters he had no knowledge of such "alleged threats."

The Hamas-run Gaza government media office said later on Saturday that GHF operation has "utterly failed on all levels" and that Hamas was ready to help secure aid deliveries by a separate long-running U.N-led humanitarian operation. Hamas also called on all Palestinians to protect humanitarian convoys, according to Reuters.