US-Iraqi forces have rescued dozens of hostages held by Islamic State (IS) in Iraq after learning of their "imminent execution", the Pentagon has said. But a US soldier wounded in the raid died of his injuries - the first killed in action since US operations against IS began last year. The early morning operation on Thursday took place near the town of Hawija in northern Iraq. Five IS militants were captured and a number killed, the Pentagon said. About 70 hostages were rescued, a statement said, including 20 members of the Iraqi security forces. The Kurdistan region's security council said none of those freed were Kurds, contradicting initial reports.