International mediators were with Hamas negotiators in Cairo Tuesday for talks on a truce to pause nearly five months of fighting in Gaza before the Muslim holy month of Ramadan, which begins early next week. Envoys from the Palestinian militant group and the United States were expected to meet with Qatari and Egyptian mediators for a third day of negotiations on a six-week truce, the exchange of dozens of remaining hostages for hundreds of Palestinian prisoners and increased aid to Gaza.