Xinhua News Agency said one of the ships sank after the pre-dawn collision. It said of the 17 on board, 15 died, one was rescued and another was missing.
It did not give any other details. Earlier, the government's work safety agency said 14 were missing after the collision.
The 3,500-mile Yangtze runs from the Tibetan plateau to the sea near Shanghai and is a major shipping route.