NEW DELHI, Oct 6 (INP): An IAF Mi-17 V5 helicopter crashed Friday morning near Tawang in Arunachal Pradesh killing five people and critically injuring one. Reports said there were six people on board the Mi-17 V5 helicopter, which is a military transport chopper. The helicopter reportedly crashed around 6 am Friday while it was on an air maintenance mission. A court of inquiry has been ordered. INP/AH/LK