"The most updated data about the casualty is 29 people dead and around 41 others are still unfounded," Kadri said as quoted by the Xinhua news agency.
Kadri indicated that as many as 98 people had been rescued from the vessel.
READ MORE: Ferry With 139 Aboard Sinks, Killing Six People in Indonesia (PHOTOS)
Indonesian National Board for Disaster Management said earlier in the day that the accident might have been provoked by a leak in the ferry's hull.
The vessel with 138 passengers on board and loaded with 48 automobiles and motorcycles went down Tuesday afternoon in central Indonesia, near the Sulawesi Island. The rescue operations are currently ongoing at the site of accident. It was earlier reported about 24 victims.