Israeli airstrike kills at least 10 near Gaza school as ceasefire strains

By Nidal al-Mughrabi and Mahmoud IssaCAIRO/GAZA, April 6 (Reuters) - An Israeli airstrike killed at least 10 people and wounded several others outside a school housing displaced Palestinians on Monday, health officials said, in the latest violence overshadowing the fragile U.S.-backed Gaza ceasefire deal.Before the strikes, some Palestinians had clashed with members of an Israeli-backed militia, who they said attacked the school in an attempt to abduct some people, medics and residents said.