According to official reports, a former Pakistani spy agency official kidnapped by a little-known group under mysterious circumstances and later killed was buried in Islamabad.

The Daily Times has reported that Khalid Khawaja, 58, a former Inter-Services Intelligence official, was reported killed Friday at a village in Pakistan's North Waziristan tribal region and a group calling itself Asian Tigers claimed responsibility. The report also said that he was kidnapped March 26 as he traveled to the tribal region.

Khawaja was accused by his abductors of working for the U. S. Central Intelligence Agency and the Pakistani agency, the Washington Post has reported.

His killing brought to light such previously unknown secrets as how he had tried to establish direct contacts between the United States and the Taliban and to mediate between the Pakistani army and the Taliban, Pakistan's News International has reported.

However, the report said his efforts were unsuccessful because of a lack of trust between him and Pakistan's current military leadership.

It was further said by the report that Khawaja's alleged contacts with some former CIA officials and an American businessman also created problems for him.

"How could the Mujahedin kill their supporter?" the Post quoted an engineer attending the funeral as saying.

The report quoted security analysts as saying they believe North Waziristan, once a sanctuary for Taliban fighters with links to the Pakistani military, has now become an area harboring different militant groups with different loyalties. The Asian Tigers, for example, is believed to be a Punjab-rooted organization battling the Pakistani state.

Khawaja, a former Pakistani air force officer, had claimed ties to al-Qaida leader Osama bin Laden. Lately, he had been a legal adviser to five American being held in Pakistan accused of terrorism, the Post has said. (With Inputs from Agencies)