Israeli airstrikes early Wednesday killed 20 Palestinians in central Gaza, including six children and three women, some of them inside a purported “safe zone” declared by the Israeli military, hospital authorities said. This second straight night of deadly strikes in the central town of Deir al-Balah and nearby refugee camps came as U.S., Egyptian and Qatari mediators as well as Israeli officials came together in the Qatari capital, Doha, for talks trying to push through a long-elusive deal for a cease-fire and hostage release.

Israel and Hamas had appeared to narrow the gaps in recent days, but obstacles remain. Strikes early Wednesday hit three houses in the Nuseirat refugee camp, killing 12 people including five children, said authorities at al-Aqsa Martyrs Hospital, where the casualties were taken. An Associated Press reporter counted the bodies.