WASHINGTON (AP) — President Joe Biden said Wednesday that he would not supply offensive weapons that Israel could use to launch an all-out assault on Rafah — the last major Hamas stronghold in Gaza — over concern for the well-being of the more than 1 million civilians sheltering there.

Biden, in an interview with CNN, said the U.S. was still committed to Israel’s defense and would supply Iron Dome rocket interceptors and other defensive arms, but that if Israel goes into Rafah, “we’re not going to supply the weapons and artillery shells used.”

The U.S. has historically provided enormous amounts of military aid to Israel. That has only accelerated in the aftermath of Hamas’ Oct. 7 attack that killed some 1,200 in Israel and led to about 250 being taken captive by militants. Biden’s comments and his decision last week to pause a shipment of heavy bombs to Israel are the most striking manifestations of the growing daylight between his administration and Israel Prime Minister Benjamin Netanyahu’s government. Biden has said that Israel needs to do far more to protect the lives of civilians in Gaza.