Italian Prime Minister Mario Monti will leave the NATO summit in Chicago early to deal with crises at home, where an earthquake on Sunday in the north killed at least six people and a bombing at a school a day earlier killed a girl, dpa reported. "In light of the tragic incident in Brindisi and the earthquake in Emilia Romagna I have decided to participate only in the beginning of the NATO summit and then to leave in order to be in Italy tomorrow afternoon," Italian news agency Ansa quoted him as saying. He promised aid to the earthquake victims.