Israeli strikes killed at least 72 people across Gaza overnight and into Saturday, health workers said, as ceasefire prospects were said to be improving after 21 months of war, Associated Press reported.

Three children and their parents were killed in an Israeli strike on a tent camp in Muwasi near the southern city of Khan Younis. They were struck while sleeping, relatives said.

“What did these children do to them? What is their fault?” said the children’s grandmother, Suad Abu Teima, as others knelt to kiss their bloodied faces and wept. Some placed red flowers into the body bags.

Also among the dead were 12 people near the Palestine Stadium in Gaza City, which was sheltering displaced people, and eight more in apartments, according to staff at Shifa Hospital. More than 20 bodies were taken to Nasser Hospital, according to health officials, according to Associated Press.