ISLAMABAD — Pakistani warplanes and ground forces killed at least 77 militants in a northwestern tribal region near the Afghan border, officials said today, days after Taliban fighters killed 148 people — most of them children — in a school massacre.

Meanwhile, a Pakistani prosecutor said the government will try to cancel the bail granted to the main suspect in the 2008 Mumbai terror attacks — a decision that outraged neighboring India and called into question Pakistan's commitment to fighting militancy.

The violence at a school in Pakistan's northwest earlier this week stunned the country and brought cries for retribution. In the wake of the mass killing the military has struck targets in the Khyber tribal region and approved the death penalty for six convicted terrorists.

The military said its ground forces late Thursday killed 10 militants while airstrikes killed another 17, including an Uzbek commander. Another 32 alleged terrorists were killed by security forces in an ambush in Tirah valley in Khyber on Friday as they headed toward the Afghan border, the military said.

On Friday morning, troops killed 18 more militants during a “cordon and search operation” in Khyber, the military said.

WASHINGTON — Two senior Islamic State group leaders were killed in U.S. and coalition airstrikes in northern Iraq over the last week, U.S. officials said Thursday, as Defense Secretary Chuck Hagel approved new orders for several hundred troops to deploy to Iraq to train Iraqi forces.According to one of the U.S. officials, airstrikes killed a key deputy of Abu Bakr al-Baghdadi, the leader of the Islamic State militants, and one of al-Baghdadi's military chiefs. A third militant, described as a mid-level leader, was also killed.The U.S. is sending 1,500 more Americans to advise and train Iraqi forces.The next wave of American troops will begin moving into Iraq in a couple of week.