Lahore, Pakistan (CNN) -- Pakistani air force planes swooped down on the country's troubled tribal region on the border with Afghanistan Tuesday, launching a blistering airstrike that left as many as 50 militants dead, Pakistan Army sources said.
People flee Miran Shah, North Waziristan, after heavy fighting between Islamic militants and security forces.
The strike in the Miran Shah region was the latest salvo in intense fighting between Pakistani security forces and Taliban and al Qaeda militants that broke out Saturday, as the summer cease-fire crumbled even further.
Those battles -- in North Waziristan, part of the country's largely lawless tribal region -- killed up to 150 militants, as well as 50 government troops, an army spokesman said. Another 20 security forces have been wounded. Intelligence sources said 12 to 15 soldiers remain missing.
According to the army spokesman, the military operation, which was launched Sunday, will continue until peace is completely restored to North Waziristan.
Pakistani officials offered few other details about the scope of the latest fighting which follows recent attacks on Pakistani security forces and a breakdown over the summer of a ceasefire between the Islamabad government and tribal leaders.
That truce was blamed for an increase in attacks on U.S. troops over the border in Afghanistan, as Taliban fighters were able to prepare, train, and reconstitute weapons supplies without interference from the Pakistani government.
The Taliban are the former Afghan regime that sheltered al Qaeda until the U.S.-led war following the September 11, 2001 attacks. U.S. intelligence officials say al Qaeda has established a "safe haven" in Waziristan, just over the border into Pakistan -- and that Osama bin Laden is believed to be in the area.
American and NATO troops pushed the terrorist network and its Taliban allies out of power in Afghanistan following the 2001 terrorist attacks on New York and Washington, but top leaders -- including al Qaeda mastermind bin Laden -- are believed to have found refuge in the mountainous border zone.
Pakistan's president, Gen. Pervez Musharraf, cracked down on al Qaeda militants and arrested many in the Waziristan area before the truce was reached, but critics say he has failed to prevent the militants from gaining strength within the country. E-mail to a friend
CNN's Dan Rivers in Islamabad contributed to this report
All About Pakistan • Islamabad • The Taliban • Al Qaeda
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The Pakistani army says that at least 150 to 200 Taliban militants, along with 50 Pakistani troops have been killed in  between al-Qaeda, Taliban fighters and Pakistani troops along the border region of Pakistan and Afghanistan in an area known as . At least 20 other troops were injured and at least 15 are reported to be missing. 12 civilians are also reported to have been killed.

"We have told them to surrender and give up their weapons," said Major General of the Pakistani army,  Waheed Arshad. Militants say that they are going to attempt to overthrow the government and take the newly elected Pakistani President Pervez Musharraf out of power.

The battles began on Saturday October 6 in the town of Mir Ali and have lasted three days so far. Army officials say that they will "continue punitive action until complete peace is restored." The battles were triggered after several Pakistani officials were targeted and peace talks with officials in Islamabad failed to go forward.

In September, Osama bin Laden issued a new audio tape in which he told militants to resist Pakistani troops and rebel against the army. He also asked militants to seek revenge for the assault on the Red Mosque when almost 100 were killed by militants and troops.