Democratic Senator Cory Booker says it’s been “heartbreaking” to witness the “catastrophic hunger and suffering of civilians” in Gaza, and called for an immediate and drastic surge in aid to the besieged enclave.

“It is our collective moral duty to ensure that humanitarian relief reaches those who need it most urgently. The strategy of the Gaza Humanitarian Foundation has not worked,” he wrote.

Booker also said aid must not be diverted by Hamas, despite the New York Times reporting a day earlier that the Israeli military has never found proof that aid is being diverted by the Palestinian group.

“Every moment of delay will cost lives and cause irreparable harm to the health of children, pregnant women, and other civilians,” the senator added.