On a weekend that saw heavier traffic conditions on the country’s highways due to Friday’s national holiday, six people were killed in a single car accident in Halkidiki, northern Greece. Police said that early yesterday morning a vehicle carrying five people was involved in a head on collision with another car in Nea Moudania. The five people in the one car were all Albanian nationals, while the driver of the second car was Greek. Police are conducting an investigation into the causes of the accident. In a separate accident that occurred nearby in Halkidiki on Saturday, a 45-year-old woman was killed when the vehicle she was driving veered into the opposite lane and hit an oncoming car. The driver of the other vehicle was slightly injured. Traffic authorities estimate that some 300,000 Athenians left the city over the weekend, taking advantage of the long weekend.