Authorities have not said how many people were rescued or missing.
The boat, which was about 150 tourists, sank in Colombia.
According to the Agency, the incident occurred in the reservoir near the town of Guatape in the North-West of the country. In the scene heading of the helicopter.
At the same time, the mayor of Medellin, located West of the reservoir, said the dispatch of firefighters and divers in Guatape, the Agency said.
Those who managed to escape, local media reported that the ship called El Almirante was overloaded and none of those on Board had life jackets.
Authorities have not said how many people were rescued or missing.
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