Waheedullah Sabawon, advisor for Afghan President Hamid Karzai on tribal affairs and seven others were wounded Monday while a roadside bomb went off in Jalalabad, the capital city of the eastern Nangarhar province, a senior military official said.

"An explosive device was planted in a rickshaw in Angorbagh area in Jalalabad city and detonated at around 1:15 p.m. local time, when the motorcade of Waheedullah Sabawon was passing the road. As a result, Sabawon and seven others including three of his bodyguards and three civilians were injured," Colonel Ibrahim Khil, commander of garrison of Jalalabad city told Xinhua.

Health official in hospital told media that the advisor received minor injuries but two wounded persons were in critical conditions.

Khil did not point finger to any groups for organizing the blast. However, Taliban militants have in the past been blamed for carrying out such attacks.

In the meantime the hardline outfit that declared spring offensive dubbed "Al-Fatah" or victory in early May this year, has yet to make comments.

Despite the presence of over 130,000-strong NATO and U.S. forces in Afghanistan, the Taliban-led militancy have been rising after the group, who were ousted from power in late 2001, made a bloody comeback a few years ago.