Updated

A Somali police official says five people have died and six others wounded when a bomb believed to have been targeting a government vehicle exploded in Mogadishu, Somalia's capital.

Mohamed Abdi said Saturday the bomb went off as a government vehicle drove near a key junction in the city. The type of the explosive remains unknown.

No group has immediately claimed responsibility but the blast is suspected to be the workd of the al-Qaida-linked al-Shabab militants who are waging an insurgency against Somalia's weak, U.N.-backed government.

Al-Shabab has resorted to terror attacks in Somali capital after African Union troops backing the Somali government pushed out the militants from Mogadishu in 2011. Somalia is struggling to rebuild after decades of conflict following the ouster of the dictator Siad Barre in 1991.