A section of Somalia's Ahlu Sunnah Wal Jama'a militia group has vowed not to recognize a deal signed by their fellow group members with the weak UN-backed Somali government in Ethiopian capital, Addis Ababa.

Led by the group's foreign relation officer, Sheikh Bashir Abdi Olaad and his colleague Sheikh Abdiqadir Abdirahman (Abu-Zakriya), the section said ' the deal a betrayal to the unity of the group and we feel that this agreement is intended to disintegrate the group," Sheikh Bashir told reporters in Abudwaq town in central Galgadud region.

"This agreement was a betrayal which is meant to hijack the group. We are making it clear that we do not recognize but also we are not opposed to the government," Abu Zakariya said.

On Monday, deputy Prime Ministermar Sharif Xasan led his side in signing a power-sharing deal with Ahlu Sunnah's overall chairman Ma'alin Mohammud Sheikh Hassan at the African Union headquarters in Addis Ababa .

In the agreement, Ahlu Sunnah would be given five ministerial positions, top appointments in the military, the police, and the intelligence service in return to its support to ward off militants threatening to topple the fragile UN-backed government.

The pact was endorsed by African Union, the Arab League, UN Special Envoy and the Organization of the Islamic Conference.

The fragile government is holed up in the few blocks of Mogadishu and guarded by some 5,300 AU peacekeeping troops with much of the country's south and central falling under the hands of powerful insurgents.