Bush spent Thanksgiving at the presidential retreat of Camp David.
Names of Americans wounded in the attacks had not been released.
"The [U.S.] Consulate in Mumbai will continue to work with the Indian Police until all missing American citizens have been accounted for," State Department spokesman Gordon Duguid told ABC News. "Our Consulate General in Mumbai is working to identify and assist American citizens who are victims of the attacks."
The most dramatic conclusion came Friday at Chabad House, the Jewish center, with troops rappeling onto the roof from helicopters and the building being peppered with grenades as residents crowded surrounding rooftops to cheer on the attack.
At one point troops were seen dangling what appeared to be a mannequin over the side of the building in an apparent attempt to get the terrorists to reveal themselves.
Despite the blasts, militants inside continued to fire intensely at the advancing troops, until a huge blast rocked the building. The explosion was so powerful that debris flew off the sides of the building.
A few more shots were exchanged before the building went quiet and searchlights could be seen moving through the house. People streamed into the streets singing.
The Indian government reported, however, that five hostages inside the building had died. Among the dead was American rabbi Gavriel Holtzberg, 29, and his wife, Rivka.
A cook for the center had escaped earlier with the couple's 2-year-old son. The boy was unhurt, but his clothing was covered in blood.
The militants, believed to number about 20 to 25, surged into Mumbai's fashionable downtown district on Wednesday firing indiscriminately into hospitals, a train station, a cafe and other sites before taking hostages and preparing for a fight to the death in the two hotels and the Chabad center.
An Indian commando who fought them said the fighters were young men who were ruthless.
"They were the type of people with no remorse. Anybody and whosoever was in front of them, they fired," the commando told a news conference.
Fighting continued into Saturday the Taj hotel despite officials having twice in recent days declared it to be under the control of government troops. The troops blasted a third-floor window with a rocket-propelled grenade. Debris from the blasts showered crowds outside, wounding several bystanders.
At the Trident-Oberoi, the fighting ended after Indian troops claimed they killed the final two attackers who had taken over the hotel, killing staff and tourists and setting the building on fire.
"The hotel is under our control," J.K. Dutt, director-general of India's elite National Security Guard commando unit, told reporters.
Hundreds of people have been freed from the two hotels, many rushed immediately into ambulances. Survivors reported seeing dead bodies in the hallways and lobbies.
In an e-mail the group sent to news organizations, Deccan Mujahideen cited attacks on Muslims in India as the reason for the assault.
"You should know that your acts are not at all left unnoticed; rather we are closely keeping an eye on you and just waiting for the right time to execute your bloodshed," the communique said.