Over 18 flights to and from Lahore were delayed after dense fog enveloped the city on Friday morning. According to the spokesperson of the Allama Iqbal International Airport, three domestic flights landing and six taking off from the city have been delayed. On the other hand, six international flights flying from Lahore and five arriving flights faced a delay. The fog has affected road transport in the city as well. Motorways M-3 from Lahore to Darkhan and M-4 from Pindi Bhattian to Shorkot have been closed for traffic. Related: Karachi residents warned against driving at night, heavy fog expected The motorway police have requested people to avoid travel unless absolute...