The U.S. military says it has not found the pilot of an F-16 fighter jet that crashed in Iraq Monday.
Officials say the pilot was not at the crash site northwest of Baghdad when U.S. ground forces arrived. The Air Force says it cannot confirm whether the pilot is alive or dead.
Military officials say fighter aircraft spotted insurgents in the area of the crash site immediately after the warplane went down.
Air Force officials say the cause of the crash is being investigated but that it is unlikely the jet was shot down.
Some information for this report was provided by AFP, AP and Reuters.