SEATTLE – At least four international college students were killed when a tour bus and a duck boat tourist vehicle collided Thursday morning in Seattle, officials said. The students attended North Seattle College, which said several students are in critical condition, while other students and a North employee had serious injuries. “Because the deceased were international students, government officials are working to contact next of kin,” the school said.   “We extend our deepest condolences to the families of these deceased students, as well as to the students and employee who sustained injuries.” In the hours after the accident, fire officials said 44 people were hospitalized, 12 of whom were in critical condition.(CNN/PHOTO: CNN.COM)…[+]