A flash flood swept away a group of hikers alongside a river in southern Greece, killing at least six people, police said Sunday. Two others were missing. The dead were identified as four women and two men, all Greek nationals aged 23-36. Police said the incident occurred late Saturday as a group of 18 Greek hikers, including two guides, were walking along the banks of the Lousios River, near the village of Dimitsana in the western Peloponnese, about 180 kilometers southwest of Athens. A flash flood, caused by heavy rains, struck the group as they were trying to cross the river and swept eight people away, police said. Rescuers are combing the area to locate the three missing hikers.