More than 100 Israeli soldiers signed a letter saying they’ll refuse to serve in the military unless the government commits to a Gaza ceasefire and secures the release of captives held there, Al Jazeera reports.

According to the Israeli newspaper Haaretz, the 130 signatories of the letter — addressed to Israeli cabinet ministers and army chief of staff — included reservists and draftees from various units.

“It is now clear that continuing the war in Gaza does not only delay the hostages’ return from captivity, but also endangers their lives. Many hostages have been killed by [army] strikes, many more than those who have been rescued in military operations to save them,” the letter said.

Warning they “will not be able to continue serving” unless the government pursues a captive deal, it added: “For some of us, the red line has been crossed already. For others … the day is approaching when we will, with broken hearts, stop reporting for duty.”