Gaza faced heavy aerial and ground bombardment overnight Saturday and into Sunday as a hospital in the centre of the enclave reported receiving 20 dead civilians. An Israeli airstrike hit a residential building in Nuseirat refugee camp, killing 20 people and wounding others, Al-Aqsa Martyrs Hospital said in a statement. The Israeli military has been engaged in fierce battles with Palestinian fighters, including from Islamic Jihad and Hamas, in northern Gaza’s Jabalia area and the southern city of Rafah on Sunday, with multiple missile attacks reported. Meanwhile, top US security official Jake …