McChrystal said coalition forces did not target any sites in the area of the marketplace. He said the damage could have been caused by a surface-to-air missile fired by the Iraqis or by fallout from Iraqi anti-aircraft artillery.
U.S. Central Command Wednesday said it destroyed nine surface-to-air missile sites around Baghdad in the early morning.
McChrystal said that attack was separate from the marketplace incident but added, "We can't make any assumption. We do know we did not target in the residential district."