DEIR AL-BALAH, Gaza Strip (AP) — The Israeli military says it is looking into whether Hamas’ top leader Yahya Sinwar was killed in a military operation in Gaza. In northern Gaza, an Israeli airstrike on a school sheltering displaced Palestinians killed at least 15 people, including five children, according to Gaza’s Health Ministry. The Israeli military said in a statement Thursday that three militants were killed during operations in Gaza, without elaborating. It said the identities of the three were so far not confirmed, but it was “checking the possibility” that one of the three was Sinwar. Sinwar was one of the chief architects of Hamas’ attack on Israel on Oct. 7, 2023.