Hamas is waiting for a response from Israel on its ceasefire proposal, two officials from the militant Islamist group said on Sunday, five days after it accepted a key part of a US plan aimed at ending the nine-month-old war in Gaza.

“We have left our response with the mediators and are waiting to hear the occupation’s response,” one of the two Hamas officials told Reuters, asking not to be named.

The three-phase plan for the Palestinian enclave was put forward at the end of May by US President Joe Biden and is being mediated by Qatar and Egypt. It aims to end the war and free around 120 Israeli hostages being held by Hamas.

Another Palestinian official, with knowledge of the ceasefire deliberations, said Israel was in talks with the Qataris. “They have discussed with them Hamas’ response and they promised to give them Israel’s response within days,” the official, who asked not to be named, told Reuters on Sunday.

Israeli Prime Minister Benjamin Netanyahu has said that negotiations would continue this week but has not given any detailed timeline.