The incident happened on Saturday afternoon (Jan 8th), when several large rocks in Brazil's Lake Furnas collapsed from a canyon onto four boats (2 now sunk) carrying tourists. 

The 10 who were killed were directly affected by the impact of the stones, whereas the remaining 32; injured were sent in for treatment.

According to reports, 29 of the 32 have already been discharged, but there are still a number of tourists who are missing.

On Saturday morning, there were heavy rains in the area, which geologists have come to believe the reason for the collapse.