In tragedy captured on social video, Brazilian cliff collapses on tourist boats at lake

A cliff collapsed Saturday onto leisure boats at a Brazilian lake, killing seven and injuring 32, authorities said.

Three people are still missing in the horrifying tragedy on Lake Furnas that was captured on social video, fire officials said.

Large rocks on the cliff became more susceptible to collapse after days of rain in Minas Gerais state, and three boats were struck by the falling debris on the popular tourist lake, authorities said. 

A video posted on Twitter shows a large swath of boulders from a cliff come crashing into the water, striking the tourist boats.

Rovilson Teixeira told the Brazilian outlet OTempo he has never seen anything like it. 

 "We are all stunned, nobody knows how many victims, but I can already tell you that there were not one or two deaths, but many deaths," he said. "There are a lot of hurt people. The region is full of ambulances that have come from other areas to pick up the victims, but no one yet realizes the scale of the tragedy here."