Two people were killed and six suffered injuries due to fog-related accidents in Uttar Pradesh's Barabanki district, officials said on Friday. Dense fog was reported in various parts of the state on Friday as the visibility dropped to around 40 metres at several places. The state meteorological department said a thick blanket of fog is likely to engulf 30 districts of the state over the weekend. The two separate accidents in Barabanki occurred on Thursday night due to reduced visibility caused by dense fog, police said. Nitin (20) died as three motorcycles collided with each other near Budhwal Sugar Mill on Ramnagar Barabanki-Bahraich Highway on Friday afternoon, police said. Six others suffered injuries in the mishap and were admitted to hospital for treatment, they said. In another accident, a 26-year-old labourer, Pappu, died after he was hit by a speeding motorcycle while returning home on his bicycle in the Ghunghter area on Thursday night. In Gorakhpur, weather conditions changed dramatically on Friday morning with dense fog lowering visibility to as low as 20 metres and the minimum temperature dropping to 9 degrees Celsius. Vehicles were seen moving crawling on the roads with their headlights on during the day. The impact of the poor visibility was also seen on movement of trains, buses, and flights, a senior officer said.