At least 30 people were killed and over 100 injured in intensified fighting between the Somali National Army and its former ally Ahlu Sunnah Wal Jama'a, or ASWJ in the Somali state of Galmudug over the weekend, residents and hospital officials said.
The clashes, in the state's second-largest district of Guriceel, run the risk of distracting both groups from their fights against Al Shabaab, analysts and residents said.
This round of fighting broke out early Saturday and continued into Sunday, reports Reuters citing the residents.
"I am sure over 30 people died because I know 27 of them and they belong to both groups," elder Farah Abdullahi told Reuters. His estimates were echoed by 10 residents interviewed individually.
Both the army and ASWJ were not reachable for comment.
ASWJ is a group of moderate Sufi Muslims which has played a key role in the fight against the al Qaeda-linked al Shabaab insurgency.
But tensions between the armed group and the federal government have been building for years. ASWJ accuses the government of not doing enough to fight Al Shabaab, while the government accuses ASWJ of acting without its permission.
Tensions came to a head earlier this month, when federal forces launched what it called a preemptive attack on ASWJ. ASWJ repelled the attack and captured Guriceel, whose residents welcomed the group.
The dead from the weekend's fighting include senior SNA officer Abdi Ladiif Fayfle, the commander of the US-trained Danab forces, a relative told Reuters.
Fayo Care Hospital in the town received 30 people injured in fighting, while Istarlin Hospital, also in the town said it received 10, officials at the hospitals told Reuters. Hanano Hospital in a nearby town received 60, an official told Reuters.
The SNA also airlifted a plane of injured soldiers to the capital, an airport worker told Reuters.
Galmudug state security minister Ahmed Moalim Fiqi resigned earlier this month, citing federal officials' refusal to heed his pleas not to attack ASWJ.
"Many parts of Galmudug and the entire country is under al Shabaab. The commander of SNA is destroying Guriceel town and massacring ASWJ who are famous for eliminating Al Shaabab," he told Saturday.
Later on Saturday, Al Shabaab militants hit a Galmudug airport with mortars, airport workers said, compounding fears that the group would take advantage of the chaotic infighting.
"The escalation of the dispute between ASWJ and the government distracts from, if not undermines, other priorities like progressing with elections and the struggle against Al-Shabaab," said Omar Mahmood, Somalia analyst at the International Crisis Group think-tank.