Workers in the Pakistani capital, Islamabad, fear reprisal attacks by the Pakistani Taliban following the assassination of the group's leader in a US drone strike.

Security has been put on high alert across the country after the Pakistani Taliban threatened to avenge Hakimullah Mehsud’s death.

Some politicians claim that Mehsud's killing will affect the peace process between Pakistan and the Taliban.

Al Jazeera's Imtiaz Tyab reports from Islamabad.

Source: Al Jazeera