WASHINGTON (AP) — Top American and Israeli officials held virtual talks Monday as the U.S. pushed alternatives to the ground assault against Hamas under consideration by Israelis in the southern Gaza city of Rafah, a move the U.S. opposes on humanitarian grounds and that has frayed relations between the two allies.

President Joe Biden and his administration have publicly and privately urged Israel for months to refrain from a large-scale incursion into Rafah without a credible plan to relocate and safeguard noncombatants. Israeli Prime Minister Benjamin Netanyahu has insisted that Israel I forces, which are trying to eradicate Hamas after the Oct. 7 attack on Israel, must be able to enter the city to root out the group’s remaining battalions.

The more than two-and-a-half-hour meeting by secure video conference was described by both sides as constructive and productive, as Washington encourages the Israelis to avoid an all-out assault on the city, where an estimated four battalions of Hamas fighters are dispersed among more than 1.3 million civilians. The White House has instead pushed Israel to take more targeted actions to kill or capture Hamas leaders while limiting civilian impacts.

The potential operation in the city has exposed one of the deepest rifts between Israel and its closest ally, funder and arms supplier. The U.S. has already openly said Israel must do more to allow food and other goods through its blockade of Gaza to avert famine.