Fog causes series of accidents in Hoa BinhNineteen cars collided in a series of accidents on Highway No 6 in northern Hoa BinhProvince on Sunday. A series of cars collided with each other due to heavy fog. — Photo news.zing.vnColonel Nguyen Ngoc Minh, chief police officer of Mai Chau District, told zing.vn that five accidents occurred on the highway running through Tân Sơn Commune due to dense fog and slippery roads caused by rain. The accidents caused traffic congestion on the highway for several hours, which eased out after 5pm. The fog and rainy weather were caused by a cold spell in the northern region since Saturday.