Fog prevails in several cities of Punjab.

LAHORE -- Several cities including Lahore of Punjab are in the grip of fog. The limit of visibility at National Highways is 50 meters and Motorways M 3 and 4 have been closed. Motorway police has issued advisory to the public to avoid unnecessary travel. In Multan flights have been diverted to Islamabad due to thick fog. Many cities of Sindh are also in the grip of heavy fog and one person has been...