Hamas fighters holed up in the Israeli-held Rafah area of Gaza will not surrender to Israel, the group’s armed wing said on Sunday, urging mediators to find a solution to a crisis that threatens the month-old ceasefire.

Sources close to mediation efforts told Reuters on Thursday that fighters could surrender their arms in exchange for passage to other areas of the enclave under a proposal aimed at resolving the stalemate.

Egyptian mediators have proposed that, in exchange for safe passage, fighters still in Rafah surrender their arms to Egypt and give details of tunnels there so they can be destroyed, one of the sources, an Egyptian security official, said.

Sunday’s statement from the Qassam Brigades held Israel responsible for engaging the fighters, who it said were defending themselves.

“The enemy must know that the concept of surrender and handing oneself over does not exist in the dictionary of the Qassam Brigades,” the group said.

US special envoy Steve Witkoff said on Thursday that the proposed deal for about 200 fighters would be a test for a broader process to disarm Hamas forces across Gaza.

The Qassam Brigades did not comment directly on the continuing talks over the fighters in Rafah but implied that the crisis could affect the ceasefire.

“We place the mediators before their responsibilities, and they must find a solution to ensure the continuation of the ceasefire and prevent the enemy from using flimsy pretexts to violate it and exploit the situation to target innocent civilians in Gaza,” the group said.