Hours before the cease-fire was to take effect, 17 Palestinians were killed in Israeli strikes, including 10 people from the same family, said Ashraf al-Kidra, a Gaza health official. In the hours before the cease-fire took effect Friday, Gaza police reported heavy Israeli tank shelling in northern and eastern Gaza, and the loud exchange of fire between Israeli troops and militants was audible throughout Gaza City. Hamas fighters hit an Israeli tank with an anti-tank missile, Gaza police said, and then attacked Israeli troops who came to evacuate the tank crew.