At least four people were killed and several others injured in a mortar attack in the Somali capital Mogadishu on Wednesday.

The Somali National Army (SNA) radio said al-Shabab militants fired mortar shells which landed in Bondhere and WartaNabada residential districts in the Banadir region, killing the four people.

"Several people sustained injuries during the attack," the SNA radio reported.

Al-Qaida allied terrorist group al-Shabab claimed responsibility for the latest attack, saying their fighters targeted the Somali presidential palace.

However, no mortar shells landed on the heavily fortified facility in the latest attack which is the second mortar attack in less than two months in the restive capital.