Israeli aircraft fired two missiles at a Hamas installation in the central Gaza Strip on Friday, Palestinian security officials said, adding that there were no casualties. The Palestinian officials said the attack between the towns of Khan Younis and Deir el Balah hit a building belonging to the Hamas fighting force known as the Executive Unit. The Israeli army confirmed it carried out a strike on a Hamas target south of Deir al Balah, but gave no further details, the Associated Press reported.