Israeli airstrike on Gaza school sheltering displaced people kills at least 18, including UN staff, Palestinian officials say

​ At least 18 people, including United Nations staff, were killed in an Israeli airstrike on a UN school-turned-shelter in the Nuseirat camp in central Gaza on Wednesday, according to the Gaza Civil Defense and hospital officials. At least 44 others were injured, they said. Read More Breaking News, Latest News and Videos | CNN