Zurich, Sept. 11 (SANA)Five people were killed and 40 injured after a bus carrying Dutch tourists overturned in theSwiss Alpson Friday, police said.The crash occurred near the village of Susch ineastern Switzerland, The Associated Press reported, citing Swiss police. Three of those injured were in critical condition.Images posted online showed the bus lying on its side on the road as police and emergency crews worked at the scene.Authorities have not yet determined what caused the crash.