Twenty-one tourists from the Chinese mainland were injured after a double-decker tour bus crashed into a pier of an overpass in Kaohsiung City, Taiwan, on Saturday morning, according to local media reports. <br /> <br />All the injured people have been hospitalized, three with more serious injuries, the reports said. <br /> <br />The bus carried altogether 26 passengers, including seven children, all from east China’s Zhejiang Province. <br /> <br />A surveillance camera footage shows the vehicle wedged under the bridge. <br /> <br />The driver said he was not familiar with the route and didn't notice the height limit sign. <br /> <br />The exact cause of the accident is still under investigation.