Israel has launched a wave of airstrikes across the Gaza Strip, saying it is hitting Hamas targets in its heaviest assault in the territory since a ceasefire took effect in January.

Prime Minister Benjamin Netanyahu’s office said he had ordered the aerial attacks after Hamas’s “repeated refusal” to release the remaining hostages it holds. “This is just the beginning,” he said.

After Hamas’ Oct. 7 attacks, Israelis mobilized almost without reservation for war, and sacrifice. But the overnight airstrikes that killed hundreds in Gaza finds many Israelis exhausted by a long war and suspicious of their leaders’ motivations.