A U.S. military helicopter with two pilots aboard crashed in a field north of Baghdad on Monday morning, witnesses and the U.S. military said. There were no immediate reports of casualties. The crash occurred at about 11:45 a.m. (0745 GMT) in Mishahda, 30 kilometers (20 miles) north of the capital, an Associated Press reporter at the scene said. The military said it was an AH-64 Apache helicopter that crashed. A recovery team responded to determine the status of the crew, the military said without providing further details. The cause was under investigation. Heavy gunfire was heard at the time of the crash, and white smoke billowed from the helicopter before it burst into flames and slammed into the ground, the reporter said. Gunfire was also heard after the crash.