After Saturday's malfunctioning of the ride at Iowa's amusement park, four people were seriously injured.Adventureland Park officials say that a Raging River boat was overturned at around 7:30 p.m. Six riders were aboard. Four are in critical condition, while three others are being treated at the hospital.According to Altoona amusement park's website, Raging River is classified as a family ride. It features a photograph of Raging River, with six people facing each other in a rubber boat.According to the website, you will be wet and possibly soaked during this river rapids ride. This is a great way to cool down with your whole family!According to the Associated Press, the ride was introduced for the first time in 1983 and was just opened for the current season.According to the outlet, a 2016 employee was killed in the accident. The employees fell onto the conveyor belt as they were helping others out of boats. They died four days later.Officials from the park stated that Raging River was checked the day before the accident. It was found to be in good working order.The park stated that the ride was still closed and would undergo an inspection.Grandmother says that a boy who is hurt on Branson's roller coaster could lose his legs.Tennessee officials report that a rider was thrown 10 feet off a mountain roller coaster onto tracksAfter teens led Texas police in high-speed chase, 7-month-old was pulled from a crashed truckTexas Highway: Lawn mower blade cuts through windshield, nearly impaling couple