US soldiers shot and killed a young Iraqi girl who "appeared to be signaling to someone" along a stretch of road where several roadside bombs had recently been found, a military official said early Thursday. The shooting, which took place Wednesday afternoon, occurred in the volatile Diyala province north of Baghdad. An exact location was not given in a military statement. The girl appeared to be "around 10 years old," said Maj. Brad Leighton, a military spokesman. There has been an increase in the use of women as suicide bombers in Iraq.