Abdullah, a top Haqqani leader who was involved in the transfer of suicide bombers in Afghanistan, and six other insurgents were killed in a U.S. drone airstrike in a tribal area of Pakistan, according to the Pakistani Intelligence officials.

Pakistani officials said the attack took place early Thursday in a village known as Nargas of the Birmil area, west of Wana, the main town of South Waziristan near the Afghan border.

The death of Abdullah is a blow for the Haqqani network, according to Afghan political analysts.

"This is a major loss for the Haqqani network," Ahmad Saeedi, a political analyst said. "Their attacks on Afghanistan will decrease, but the main mastermind is the ISI; if they were not here the war would have ended."

This come while, two top leaders of the Haqqani Network-- Anas Haqqani, the step-brother of Sarajudin Haqqani, was responsible for high-level decision making in the network and Hafiz Rashid was said to have overseen the preparation of suicide bombers for attacks inside Afghanistan-- were captured by the National Directorate of Security (NDS) a month ago.

The Haqqani network is one of the most dangerous groups that frequently target foreign and Afghan troops in Afghanistan.