Gaza’s Civil Defense said 19 people were killed in the nearly three-hour delay from when the ceasefire was set to be enforced.

Israel said the ceasefire will not begin until Hamas supplies a list of the hostages held by Hamas who are slated to be returned to Israel on Sunday.

The truce aims to halt Israeli strikes that have killed more than 46,800 Palestinians and laid waste to the enclave, plus see the gradual release of hostages held in captivity for 15 months.