They set themselves a 48-hour deadline earlier this week, but on Thursday neither Hamas nor Israel had shown any signs of agreeing to a truce in Gaza despite pressure from international mediators.
The United States, Egypt and Qatar put together a framework for a deal that would include a six-week halt to fighting and the exchange of about 40 hostages for hundreds of Palestinian prisoners.
It would also see increased humanitarian aid deliveries to Gaza and many displaced people returning to what is left of their homes.