Eight days after he was taken off an airliner at Kennedy Airport in handcuffs, accused Times Square car bomber Faisal Shahzad still has not been to court to face arraignment on terrorism and weapons of mass destruction charges.

But on Tuesday, for the third time since that plot failed on May 1, American missiles slammed into a Taliban stronghold in Pakistan, killing 14 alleged insurgents, intelligence officials told The Associated Press.

It was the second missile assault since Sunday, when 10 were killed in a similar attack.

It followed ground operations against suspected terrorists in nearby Afghanistan, where Afghan police, troops and intelligence agents backed by NATO forces reportedly killed 18 militants in a joint operation in the restive southern province of Helmand on Tuesday, the AP said.

A spokesman for U.S. forces, Col. Wayne Shanks, said that two U.S. service members were killed. Officials declined to provide further details until family members could be notified.

Since Monday, a series of raids in Pakistan and Afghanistan has killed more than 65 insurgents - all as U.S. officials stressed the need to crack down on terror strongholds in the wake of the attempted bombing by Shahzad, 30.

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Shahzad, who used gas, propane and fireworks to try to turn a used Nissan Pathfinder into a car bomb he parked near the intersection of Seventh Avenue and 45th Street, has admitted to interrogators he trained in terror camps in the North Waziristan tribal region of Pakistan, a known haven for the Pakistani Taliban, officials have said. Sen. Charles Schumer was expected to call Tuesday for the State Department to categorize the Pakistani Taliban as a terrorist organization.

In an interview on "60 Minutes" Sunday, Secretary of State Hillary Rodham Clinton said the United States wants more cooperation from the Pakistan government to prevent terror attacks like the alleged attempt by Shahzad.

As Clinton said Sunday: "We've made it very clear that if, heaven forbid, an attack like this that we can trace back to Pakistan were to have been successful, there would be very severe consequences."

The United States appears to be trying to pound home that message.

The attacks Sunday occurred in North Waziristan, a region along the Afghan border and the reported base of operations for militant Hakimullah Mehsud, who is head of the Tehrik-i-Taliban Pakistan.

The group is linked to al-Qaida, officials said.

Two Pakistani intelligence officials said two missiles Sunday hit the home of a local tribesman, Awal Gul, in the Enzer Kasa village of the Datta Khel area, killing 10, the AP said. Nine of the 10 were said to be militants. The region has been the scene of most of the 30 missile attacks this year, officials said.

Shahzad, a Pakistani-American who investigators say returned in February from a five-month visit to Pakistan to his home in Bridgeport, Conn., to hatch his terror plot, has told interrogators that seeing drone and missile attacks in Pakistan was one of the reasons for his plot, officials have said.

The missile strike Tuesday occurred in the Doga area of North Waziristan, where intelligence officials said insurgents have hide-outs and training facilities - facilities similar to where Shahzad said he received training during his visit, the AP reported.

As many as 18 missiles were fired in the assault, killing 14 alleged insurgents - though the identities of those killed were not immediately known.

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The Pakistani government has officially protested the missile strikes on its territories as a violation of its sovereignty. But that may be a simple face-saving measure, as it is believed its government is also assisting the U.S. in those attacks behind the scenes, the AP said.

The Pakistani Taliban has been the target of several Pakistani army offensives during the past two years in addition to being the subject of those U.S. missile strikes.

The organization has ties to al-Qaida, officials said, as well as to the Afghan Taliban - whose forces lie just across the border from the region.

Meanwhile, it remains unclear when Shahzad will be arraigned on terror charges related to the attempted bombing in Times Square. Officials have said Shahzad is cooperating in their investigation and said he has been providing valuable information, which is why he has not yet been arraigned.