Dr. Cahyonod at the Jakarta Hospital said six people were killed in explosions at the Ritz-Carlton and Marriott hotels Friday morning.
South Jakarta police Col. Firman Bundi earlier said that four of the dead were foreigners.
At the Metropolitan Medical Center, a list was posted with the names of 36 people wounded. An official at the registration office said 11 were foreigners. She declined to give her name because she was not authorized to speak to the media.
The Marriott hotel was attacked in 2003, when 12 died, but it has been more than three years since a major terrorist attack in Indonesia.