Severe fog in plain areas has caused major trouble to train schedules, with several trains from Karachi and Quetta facing delays. According to sources, Karakoram Express was delayed by 3 hours and 30 minutes, Millat Express by 5 hours and 30 minutes and Tazegam by 4 hours. The Green Line from Islamabad and Karachi was delayed by 3 hours, Khyber