At least 30 Palestinians were killed and another 100 injured in an Israeli airstrike on a school building in the central Gaza Strip, Gaza’s Health Ministry said on Saturday. The building is said to have housed an improvized field hospital, the Hamas-controlled ministry reported. The information could not be independently verified. The Israeli military said that it had carried out an airstrike on the Khadija school in Deir al-Balah to destroy a Hamas command centre located there. Fighters from the Palestinian organization Hamas used the building to coordinate attacks on Israeli troops and hide …