tribe pledges to arrest rebels it believes were behind murder of opposition military commander

The move is in a sign of the tribal tensions that could undermine attempts to form a new government.
Abdel Fatah Younis was assassinated on July 28 after being summoned to the rebel stronghold of Benghazi for questioning.
Members of his Obeidi tribe are unhappy at the way the rebel’s National Transitional Council (NTC) has investigated his murder, amid allegations that senior opposition figures ordered the killing.
The spectre of splits and tribal tension has haunted the six-month old rebellion and could now damage attempts to unite the country.
Diplomats in Benghazi say the issue – centred on the death of one of the revolution’s most charismatic and controversial figures – will spark a crisis as the NTC tries to maintain unity and build a new government based on the rule of law.