Israeli aircraft on Wednesday bombed buildings in the Gaza Strip used by militants to store and smuggle weapons, the army said. There were no immediate reports of casualties in the air strikes. Palestinian security sources said one of the destroyed buildings was a house in central Gaza owned by a Hamas militant."Ahead of the attack, the people in the area were warned to stay away," an army spokesman said. Palestinian security sources said the second building, west of Gaza City, was hit by four missiles. The Israeli army has killed 154 Palestinians, more than half of them civilians, in Gaza since it began an offensive to stop gunmen from firing rockets into Israel and to pressure militants to free a soldier that armed groups captured on June 25. An air strike in northern Gaza on Tuesday killed a Palestinian teenager and a woman.