At least 12 people have lost their lives in two attacks outside the Somali capital, Mogadishu.

The first Monday attack happened when a bomber rammed his explosives-laden car into a convoy of African Union troops in the southwest of Mogadishu.

Shortly after the first attack, a second car bomb targeted a government convoy on the same road.

Officials said nearly 30 others have also been wounded in the attacks near the town of Afgoye.

Al-Shabab fighters have claimed responsibility for the attacks, which are the first such strikes by the group since the killing of its former leader.

On Friday, the Pentagon said a US drone killed al-Shabab leader Ahmed Abdi Godane as he was leaving a meeting of the group's top leaders on September 1.

The US carries out targeted killings through drone strikes in several Muslim countries such as Yemen, Pakistan, Afghanistan and Somalia. Washington claims the targets of the drone attacks are militants, but local officials and witnesses maintain that civilians have been the main victims of the attacks.

According to reports, the attack was carried out in a forest near Sablale district, 105 miles (170 kilometers) south of the capital.

Following Godane’s death, al-Shabab appointed Sheikh Ahmed Umar Abu Ubaida as its new leader, the group said in a statement released on Saturday.

This comes as the Somali government reportedly offered an amnesty to the fighters on September 3.

The proposal gave 45 days to the fighters to surrender and be reintegrated into the society.

Somalia has been the scene of clashes between government forces and al-Shabab fighters since 2006.

The country did not have an effective central government from 1991 to 2012, when lawmakers elected Hassan Sheikh Mohamud as the new president.