Israeli strikes pounded Gaza on Wednesday, killing at least 21 Palestinians, including two infants, and further rocking a fragile ceasefire deal, hospital officials said. Israel said it was responding to a militant attack on Israeli soldiers that seriously wounded one. Deadly Israeli strikes have repeatedly punctuated the truce since it came into effect on Oct. 10, and the escalating Palestinian toll has made many in Gaza say it feels like the war is continuing unabated.