A representative of a left-wing faction fighting alongside the Islamist Hamas movement in Gaza has told Newsweek his group is open to a temporary ceasefire in their war with Israel and called for greater efforts to establish a unity government among different Palestinian parties.

Hayya, said in a pre-recorded speech on Thursday the group had not rejected the latest U.S. proposal for a ceasefire with Israel but demanded changes that would secure the end of the war in the enclave.

The United States has vetoed a U.N. Security Council resolution demanding an immediate and permanent ceasefire in Gaza because it’s not linked to the release of hostages.

The other 14 countries on the council voted in favor of the draft as a humanitarian crisis grips the enclave of more than 2 million people.

The Security Council resolution also sought the release of all the hostages and the resumption of full-scale aid deliveries.