GAZA CITY, Gaza Strip (AP) — Israel stepped up its campaign against Gaza’s ruling Hamas on Thursday, killing three of the group’s senior military commanders in an airstrike that pulverized a four-story home, the second such attack targeting top leaders in two days.

The pinpoint pre-dawn attack on Hamas’ inner sanctum was launched minutes after the men emerged from tunnel hideouts, a security official said — displaying the long reach of Israel’s intelligence services.