THESSALONIKI, Greece—A vehicle carrying 10 illegal immigrants hoping to head from Greece north into the Balkans crashed in northern Greece overnight, leaving one person dead and nine injured, including one seriously, police said Tuesday. Police said Tuesday that the seven-seater car had been heading out of the northern Greek city of Thessaloniki toward the border when it veered off a highway into a ditch shortly before midnight. A passing motorist alerted emergency services. Authorities didn’t provide any details on the ages or nationalities of the car’s occupants, who police said had paid 150 euros ($175) each to be taken to the border, from where they hoped to make their way to Serbia. It wasn’t clear if the Balkan country was their final destination or if they were heading to another country in Europe. Greece for years has been one of the main routes into the European Union for people fleeing …