A rocket fired from Gaza has landed in Israel just as a five-hour ceasefire expired, the Israeli military says.
The rocket struck the city of Ashkelon at precisely 3pm local time as the pause in military activity ended.
Israel and Hamas had agreed the five-hour humanitarian ceasefire following a request by the United Nations so supplies could be delivered to Gaza.
Three mortar shells were reportedly fired from Gaza into southern Israel during the ceasefire.
Fighting had continued in the lead-up to the start of the ceasefire. Police in the southern Gaza town of Rafah said tank shells landed on a house, killing at least three civilians.
The Israeli military said 15 rockets were fired into Israel this morning. It also said it prevented an attack by 13 militants who infiltrated into Israel through a tunnel from Gaza.
The cross-border fighting has so far killed more than 220 Palestinians and an Israeli, according to officials.