GAZA CITY, Gaza Strip — Palestinians say a huge explosion has leveled the Gaza home of a senior Hamas commander, causing multiple casualties. Palestinians say the blast was caused by an Israeli airstrike, but Israel denies that. The explosion early Monday wrecked the house of Ala Adnaf, a commander of the Hamas military wing, Palestinian security officials said. At least 17 people were rushed to a hospital, and unconfirmed reports said two people were killed. Rescue teams were digging through the rubble. The security officials said a missile fired by an Israeli warplane hit the house. The Israeli military said...