Police in Lahore’s Ferozewala area fired tear-gas shells at protesting PML-N workers who attempted to head to the airport on Friday to greet Nawaz Sharif.
Clashes were reported in different cities in Punjab from where convoys were leaving for Lahore.
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The authorities locked down parts of Lahore to bar PML-N supporters from heading to the airport. Mr Sharif and his daughter Maryam are expected to arrive at around eight o' clock in the evening.