BAGHDAD (Reuters) - A U.S. Apache helicopter crashed west of Baghdad Tuesday but there was no immediate information on why it came down and whether there were any casualties, a U.S. military spokesman said. The helicopter, which usually carries a crew of two, crashed around 9:30 a.m. (1:30 a.m. EST) near the town of Habbaniya, about 50 miles west of the capital. The area is known for attacks by guerrillas on coalition forces.