An anti-terrorism court (ATC) in Pakistan on Saturday indicted three people for their involvement in a brazen Taliban attack on the country's largest international airport, Karachi, last year that killed 39 people.
No group has yet claimed responsibility for the attack, which forced flights at the Bacha Khan International Airport in Peshawar to be temporarily suspended.
Fresh air strikes early Tuesday targeted three Taliban militant strongholds in Mir Ali town in North Waziristan and killed 13 alleged militants
But the large military operation could spark a wave of bloody reprisal attacks, especially in Karachi or Peshawar, where militants already have a sizeable presence.
The Taliban's main stronghold is in the North Waziristan tribal district, where the Pakistan military began its offensive on Sunday night.
Pakistani military jets pounded militant hideouts in the northwestern tribal region bordering Afghanistan.
The strikes are the first in the nuclear-armed South Asian nation since an attack in December last year in which three suspected militants were killed.
The focus of the probe is a vehicle which reportedly dropped the militants near the gate of the old terminal of the Jinnah International airport.
Pressure has built on the military to act after Monday's attack by at least 10 militants, which left a nascent peace process in tatters and raised questions about how they were able to penetrate the airport in Pakistan's economic hub.
It is clear that Pakistan is facing a backlash of the terror network that it at one stage help grow.
Tracking the latest updates from the shocking attack on Pakistan's busiest airport, the Jinnah international airport in Karachi.
Asked if after the Karachi attack, the US was concerned about the safety and security of Pakistan's nuclear arsenal, Harf said there had been no discussions on the issue.
"We have offered assistance to the relevant Pakistani authorities investigating this heinous crime," a State Department spokesperson told PTI.
At least 30 people, including 10 terrorists, were killed before security forces today eventually regained control over the key facility in Pakistan's financial capital.
The Karachi airport attack is the latest in a series of Pakistan-specific fidayeen attacks. But terror outfits change both targets and tactics overnight. This presents a scary picture for India.
The assault will raise fresh concerns about Pakistan's shaky security situation, and questions about how militants were able to penetrate the airport, which serves one of the world's biggest cities.
Equipped with suicide vests, grenades and rocket launchers, they battled security forces in one of the most brazen attacks in years in Pakistan's biggest city.
The initial assault at the Jinnah International Airport began late Sunday and raged until dawn, when the military said that all 10 militants had been killed.
Authorities said all 10 militants had been killed and that the bodies of 14 victims, including security personnel and four airport workers, had been identified at the city's main hospital.
Many on Twitter blamed India for the attack and debate around internal security failure raged even as the army gained control of the situation.