Kuala Lumpur/Bangkok, Rabi'I 9, 1437, Dec 20, 2015, SPA -- Malaysia on Sunday confirmed that 13 of its citizens were killed when a tourist bus crashed into a ravine in northern Thailand, according to dpa. The Malaysian Foreign Ministry said the accident occurred mid-morning on Sunday in Doi Saket district in Chinang Mai province. Thai police said the tourist bus was travelling along a mountainous route between Chiang Mai and Chiang Rai when it lost control and tumbled down a ravine. "Twelve Chinese nationals were killed instantly and 13 more are seriously injured," a police officer had previously said at the scene on condition of anonymity. Police said they are investigating the cause of the accident. --SPA 16:53 LOCAL TIME 13:53 GMT www.spa.gov.sa/w