In the Gaza Strip, at least four Palestinians were injured—one of them with a fractured skull—after Israel launched airstrikes in three different sites in Gaza. Israel’s military said the strikes were a response to a rocket fired into southern Israel. A spokesperson for Hamas said he was unaware of any rocket attacks and that no Palestinian groups had claimed responsibility. The violence followed a warning by the United Nations last month, declaring Israel’s blockade and electricity cuts have made Gaza “unlivable” for its more than 2 million residents.