The AU says that three peacekeepers and five Islamist gunmen were killed in the ensuing battle, which saw the gunmen infiltrate the base in Mogadishu.
Five women believed to be wives of Al Shabab members were killed by a soldier in retaliation for the beheading of his wife by the group.
In a Kenyan town, close to the border with Somalia, about 36 workers have been killed in their tents and more are suspected to be missing.
Sheikh Ahmad Umar Abu Ubaidah has replaced slain Al-Shabab leader Ahmed Godane, who was killed in a US air strike.
Despite the US and EU’s thoughts that Somalia is a country that is making steady progress, the facts on the ground show that Somalia is still a mess.
Al-Shabab says it killed at least 49 people in Mpeketoni in response to the deployment of Kenyan troops in Somalia.
An attempt to target illegal immigrants and criminals in Kenya has left many Somali residents there feeling harassed.
Hooded soldiers carrying sniper rifles have unleashed a sweeping crackdown across Mogadishu in a hunt for militants and weapons.
UN experts say systematic government abuses have allowed weapons and ammunition to get into the hands of clan leaders, warlords and al-Qaeda members.
A Somali court has handed down jail sentences to a woman who said she was raped, and to the journalists who reported her story.
Security forces may be trying to silence both rape survivors and the organisations that assist them.
A tropical cyclone is feared to have killed as many as 300 people in Somalia's northeastern Puntland region, the local government says.
After receiving evidence that al-Shabab is planning attacks in the country, Ethiopia has put its security forces on heightened alert, say officials.
A drone attack on Somalia's al-Shabab has left a top suicide bomb-maker for the rebel group dead, say government officials.
A suicide bomber detonated explosives inside a small restaurant in a city north of the capital on Saturday, killing at least 12 others, police said.
Uganda has been on high alert over fears of an attack similar to the bloody mall assault by Somalia's al-Shabab fighters in neighbouring Kenya.
Belgium has arrested a suspected Somali pirate leader said to have earned millions of dollars in ransom payments operating off the East African coast.