The Pakistani Taliban threatened more violence after a five-hour assault on the nation's busiest airport that killed 29 people on Monday.
A total of 29 people, including all 10 attackers were killed in the attack.
They attack has raised a new challenge for a US ally trying to end years of fighting that has claimed thousands of lives, reports AP.
With recently started peace efforts stalled, the cautious government of Prime Minister Nawaz Sharif may be dragged closer to a decision on whether to take on the militants in earnest across a country with a long history of ambiguity when it comes to dealing with militancy.
A further weakening of stability in the nuclear power whose tribal regions are already a hotbed of foment could ripple to neighbouring Afghanistan as international combat forces prepare to withdraw from that country.
"Everywhere is a threat," warned Interior Minister Chaudhry Nisar Ali Khan. "Every area is a target, every building is a potential target."
Such an attack in Karachi, Pakistan's business centre, will likely discourage foreign investment at a time when its economy is struggling.
The Taliban said the assault on the Jinnah International Airport in Karachi, Pakistan's largest city, was in revenge for the November killing of the militant group's leader in a US drone strike.
In a telephone call to The Associated Press, the group's spokesman, Shahidullah Shahid, warned that "such attacks will continue until there is a permanent cease-fire."
The attack began late Sunday when 10 gunmen, some disguised as policemen, stormed into a section of the sprawling airport where a terminal for VIP flights and cargo is located. They opened fire with machine guns and rocket launchers, sparking a battle with security forces that lasted until around dawn.
Shahid, the spokesman for Tehrik-e-Taliban Pakistan — as the Pakistani Taliban are known — said the attack was to avenge the death of Hakimullah Mehsud, the Taliban chief who was killed in an American drone strike in November 2013.
Mehsud's death was the last major killing of a militant commander under the controversial drone program. The AP reported in May that the program has largely wound down over Pakistan, and there has not been a drone strike in the country since December.
