A missile attack carried out by a suspected U.S. drone in the tribal regions of north-west Pakistan has killed 20 persons, reports quoting officials and witnesses said.
The dead includes Mohammad Omar, a top Taliban commander, and eight al-Qaeda militants, reports said.
The raid, conducted Sunday night, targeted a compound owned by Omar in Mandatta village in the troubled region of South Waziristan.
Omar's mentor Nek Mohammed also met with the same fate four years ago.
The area where the strike took place is a stronghold of Baitullah Mehsud, the head of Taliban's Pakistani wing.
Seven students of a religious school were killed in a missile attack in North Waziristan Thursday.
Aerial strikes by U.S. forces against suspected militant targets in the Afghan border region have become frequent recently. This often led to civilian casualties, evoking protests from Pakistanis.
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On Sunday, two attacks carried out by suspected missiles from unmanned US aircraft killed 20 militants near the Pakistan-Afghanistan border in a militant camp, as reported by security officials. 
Pakistan Afghan Border.

The death toll rose from seven to 20 as reported by military officials. Two missiles were dropped on the compound in the village of Badar. 
Military officials claim that South Wazirestan is the stronghold of Pakistan Taliban leader .

A senior Taliban commander, Haji Omar, was among those killed in missile strike. Three other Taliban commanders were injured.

Pakistani insurgents, initially staggered by the U.S. reaction to the September 11 attacks, have rebuilt their organizations in the border regions; from those havens, they launch attacks against U.S. and allied forces in Afghanistan. The 80,000 to 120,000 Pakistani troops that have engaged the insurgents since 2003 have been funded by the United States at a cost of $1 billion a year. Despite the high cost, operations have been inconsistent and incomplete. 

"Cross-border raids risk provoking direct confrontation between U.S. and Pakistani forces and could accelerate the growing dissension in military ranks over continued Pakistani alignment with the United States," said Marvin G. Weinbaum, a former State Department intelligence and research analyst on Pakistan and Afghanistan, in an editorial published in Monday's edition of ''The Washington Post.''