Four people were killed in collision between over speeding coaster and a taxi here on Saturday, police said. According to details, the accident took place on CPEC route in Shinkiari area of Mansehra where passenger coaster coming from Gilgit while overtaking hit a taxi. Four taxi riders including a minor girl were killed on the spot in the accident and coaster driver fled the scene. The bodies were shifted to local hospital for postmortem. The police after registering a case into incident have constituted a team to arrest the coaster driver.