Pakistan published photos Wednesday of six terror suspects, including a top Al Qaeda (search ) operative accused of masterminding two attempts to assassinate the president, and offered large rewards for information leading to their arrests.

The advertisement published in the country's leading newspapers carried a photograph of Abu Faraj al-Libbi, a Libyan accused by President Gen. Pervez Musharraf (search ) of being behind two failed attempts on his life.

Musharraf escaped unhurt in both attacks in December, when terrorists tried to blow up his motorcade on a road near the capital, Islamabad. The first attack did not injure anybody, but 17 people died in the second attack.

Since then, Pakistani police and security agencies have been looking for al-Libbi and other suspects believed responsible for the two attacks.

On Wednesday, Pakistan offered a reward of $345,000 each for any information leading to the arrest of al-Libbi, believed to be a top Al Qaeda operative, and Amjad Hussain, who is best known as Amjad Farooqi, a Pakistani militant who also allegedly played key role in those two attacks.

Four other suspects whose photos were published in the newspapers were; Mati-ur-Rahman, Mansoor, Qari Ehsan and Omar Aqdas. It was not immediately clear why those four were being sought and differing rewards were offered for their arrests.

The advertisement gave no details about the nature of charges against the six men and only said they are "most wanted terrorists" who are "wanted for acts of terrorism."

The latest government move came a day after the father of an alleged Al Qaeda computer expert filed a lawsuit challenging what he called the illegal detention of his son, who was captured last month.

Mohammed Naeem Noor Khan (search ) was captured by Pakistani intelligence agents July 13 in the eastern city of Lahore, and a search of his computers uncovered surveillance documents of five financial institutions in the United States, prompting a terror alert in three U.S. cities.

Later, Khan led police to a hide-out of Ahmed Khalfan Ghailani (search ), a Tanzanian Al Qaeda wanted for the 1998 bombings of two U.S. embassies in east Africa. Ghailani was captured July 25 after a 12-hour shootout in eastern industrial city of Gujrat.

Babar Awan, a defense lawyer, told The Associated Press on Tuesday that Khan's father has filed a lawsuit in a court at Rawalpindi, near the capital, Islamabad, "against illegal detention of his son."

"Whatever the allegation against the boy may be, he has a right to be defended through a counsel of his own choice," Awan said.

He said Khan's family had learned about his detention only through the media.

"We don't know why and where he (Khan) is being held."

Awan said the court is yet to act on the petition of Khan's father, who is a flight attendant with Pakistan International Airlines (search).

Under Pakistani laws, such lawsuits are usually admitted for hearing, and the government is asked to explain reasons for holding any particular suspect. A law also gives the government the right to detain any terror suspect for up to one year.