Lieutenant-General Thomas Metz said only a small number of militants have been captured and that enemy casualties are significantly higher than expected. As for U.S. casualties, he would only say that about a dozen troops had been killed since the so-called "Operation Dawn" began Monday.
He also said it is likely that wanted terrorist Abu Musab al-Zarqawi fled the city before the assault.
In Fallujah, U.S. and Iraqi troops met with relatively light resistance from small groups of fighters as they made their way into the city center. Correspondents travelling with U.S. troops report scenes of devastation and entire city streets booby-trapped by insurgents.
Most of Fallujah's residents fled before the offensive.The military operation is intended to wipe out insurgents and foreign terrorists who have taken shelter in Fallujah and to restore law and order ahead of January's Iraqi elections. Some information for this report provided by AP, AFP and Reuters.