A woman and her two sons were killed in head-on collision between a pickup van and a CNG-run auto-rickshaw at Titabotgachh area of Mirsarai upazila in Chittagong district early on Sunday.Confirming the matter, Officer-in-charge of Joralganj Police Station Jahidul Kabir said the deceased could not be known immediately. In-charge of Joralganj Police Outpost Farid Uddin said, the vehicles have been removed from the spot and police are seeing the matter.