Pakistani intelligence officials say the Pakistani Taliban's deputy leader has been buried after his death in a U.S. drone strike.

The killing of Waliur Rehman has not been confirmed by the White House or the official Pakistani Taliban spokesman. But it would be a major blow to the militant group. The U.S. had accused Rehman of involvement in a 2009 suicide attack in Afghanistan that killed seven CIA employees.

Rehman's killing could rattle the incoming Pakistani ruling party's goal of negotiating with the Taliban. Rehman had previously been considered amenable to talks.

Two intelligence officials say informants on the ground told them Rehman was buried Wednesday night. Two militants claimed they attended the funeral.

All four spoke on condition of anonymity because they were not authorized to speak to media.