The country’s air force launched a rescue operation in the Guatapé region, which incorporates the Peñol-Guatapé reservoir.
Authorities did not immediately say how many people had been rescued or were missing.
Medellin’s mayor said firefighters and scuba divers were heading to the town. Videos circulating on social media showed a multi-storey ferry sinking as other recreational vehicles rushed to the distressed boat.
The Colombian air force said helicopters had been dispatched and were ready to evacuate the most seriously injured people.
More to follow …