5. Black September.
During the second week of summer Olympics in Munich, a Palestinian terrorist group called Black September managed to enter Olympic village and held 11 Israel athletes hostage. Two of them tried to fight back and were instantly killed. The terrorists demanded the release of 234 inmates of the Israel prison. Israel declined to their demand and Germany offered them a huge amount of money but the terrorists declined. The rescue operation was launched but something went wrong and the remaining athletes were killed including a police officer and 5 terrorists. Remaining were captured. The games were suspended and memorial service was held for the athletes.
6. Rio Builders.
11 construction workers were killed working on Rio de Janeiro 2016 Summer games. Accidents included electric shock, falling off the ladder and being hit by a truck. There were several critical injuries including the worker who got his leg amputated.
