Somali police say a suicide bomber has attacked the main port in the capital, Mogadishu, killing at least one civilian and also losing his own life.

Authorities say the attacker and another man penetrated a security wall on Thursday. Police say the first man detonated explosives he was wearing, killing himself and another person.

Security forces shot and killed the second attacker.

There was no immediate claim of responsibility.

The al-Qaida-linked militant group al-Shabab is fighting the Somali government and African Union troops for control of Mogadishu.

Government and AU forces have retaken parts of the capital since launching an offensive earlier this year.