At least seven people were killed and nine seriously injured when a rock wall on motorboats collapsed at the bottom of a waterfall in southeastern Brazil on Saturday, the fire department said.
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A tower of boulders suddenly separated from the canyon wall and collapsed on several pleasure boats, sending a huge wave over the lake in Capitolio, in the state of Minas Gerais.
Videos posted on social media showed tourists screaming as a column of rocks fell into the water, crashing two boats.
Authorities said three people were still missing after others feared they would find a location by phone. Divers searched the lake.
Those injured in the accident sustained broken bones and one of them was in a critical condition in hospital with head and face injuries. He said 23 others were treated for minor injuries.
The area had been subjected to heavy rain for two weeks, which could have loosened the rocks. On Saturday, a dam at an iron ore mine 300 km to the east overflowed, cutting off a major federal highway.
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