Israel has added 50 names to a list of Palestinian prisoners who may be released as part of its ongoing swap with Hamas for hostages held in Gaza. The additions are all female, the Israeli Prime Minister’s Office said. A four-day pause in fighting to facilitate the exchange of captives has been extended by two days, with the possibility of further extensions. Eleven hostages were released Monday in exchange for 33 prisoners, according to Qatari officials and the Red Cross, which said it returned some detainees to the West Bank about 2 a.m. Tuesday morning. White House National Security Council spokesman John Kirby had expressed hope that two more American hostages would be released that day, “and if not today, certainly over the next couple of days.” Since Friday, 150 Palestinians, 51 Israelis and 18 foreign nationals have been released, the U.N. said, including one American, 4-year-old Abigail Edan. About eight Americans remain in Hamas’s hands, according to Kirby.