Families of Israeli captives held in Gaza have threatened to pursue legal action against Israeli Prime Minister Benjamin Netanyahu and said that there are indications he is working to undermine negotiations with Hamas for an exchange agreement, Al Jazeera reports.

“Refusing to end the war means sacrificing the abductees and reducing the chance of their return alive. This is a violation of three legal provisions in two basic laws — the constitutional rights to life, human dignity, and burial with dignity,” they wrote, according to the Yedioth Ahronoth newspaper.

“We will petition the High Court of Justice if you continue to abandon our loved ones to the hands of Hamas.”