GAZA CITY, Gaza Strip – An Israeli missile ripped through a two-story home in a residential area of Gaza City on Sunday, killing at least 11 civilians, including five young children and an 81-year-old woman, in the single deadliest attack of Israel’s offensive against Islamic militants.

The bloodshed was likely to raise pressure on Israel to end the fighting, even as it pledged to intensify the offensive by striking the homes of wanted militants. High numbers of civilian casualties in an offensive four years ago led to fierce criticism and condemnation of Israel.

In all, 73 Palestinians, including 37 civilians, have been killed in the five-day onslaught.