Authorities said two exchange students from Asia and two local teenagers have been killed in a fiery crash on a northern New York road, as AP reported. State police said Wednesday that two teens were in a car that hit the students as they walked along a rural road Tuesday. Troopers said the car then crashed into an embankment and burst into flames. Both 17-year-old Dat Ong of Vietnam and 18-year-old Chu Xiong of China were exchange students in Plattsburgh, a city near the Canadian border. The cause of the crash is under investigation.