At least eighteen people have been killed and many more were injured when fighters from two rival groups turned on each other and clashed in central Somalia, Press TV reported.
On Monday, al-Shabab claimed victory in fighting between their forces and Ahlu Sunna Waljama'a fighters that broke out in the regional capital of Dhusamareb in the central Somali region of Galgadud, the Press TV correspondent in Mogadishu reported.
Senior Ahlu Sunna Waljama'a commander Abdi Wali Diiriye told Press TV that al-Shabab militants have retaken control of ten districts of Dhusamareb town, just days after his fighters and Somali government troops seized them.
In a recent report, the International Committee of the Red Cross (ICRC) stated that hundreds of civilians have been injured in fighting in Somalia in recent months.
The Geneva-based humanitarian institution said that a total of 5,000 patients with war injuries, including 1,900 women and children, were admitted to Mogadishu's Keysaney and Medina hospitals from January through September.
Compared to last year, it is an increase of 25 percent in the total number of war casualties and 72 percent in the number of war-wounded women and children admitted to the hospitals.
Some 4,000 patients with war injuries, among them 1,100 women and children, were taken to Mogadishu's two referral hospitals in 2009.
Somalia has not had a functioning government since 1991, when warlords overthrew former dictator Mohamed Siad Barre.
Over the past two decades, up to one million people have lost their lives in fighting between rival factions and due to famine and disease.
There are more than 1.4 million internally displaced people (IDPs) in Somalia. Over 300,000 of the IDPs are sheltered in Mogadishu.
Most of the displaced live in poor and degrading conditions on makeshift sites in southern and central Somalia, according to the United Nations High Commissioner for Refugees.