UNSOM and its partners urged all sides to exercise maximum restraint, resume dialogue, and avoid unilateral actions that may lead to a further escalation.
According to media reports, fighting began on Sunday between pro-Government forces and opposition military units after President Mohamed Abdullahi Mohamed moved to extend his term last week, which had officially ended in February, for another two years.
Reports from Mogadishu said that localized skirmishes have spread to other parts of the country, with fears growing that extremist group al Shabaab could exploit the divisions.
"We have repeatedly warned that the extension of mandates would lead to a political crisis and undermine peace, stability and security in Somalia," the statement read.
They expressed particular alarm over an emerging fragmentation along clan lines of the Somali National Army, saying that it detracts from the primary task of combating Al Shabab and protecting the Somali population.
They reiterated that the September 17 agreement, whereby the leaders of the Federal Government and all five Federal Member States approved an indirect electoral model for the country’s upcoming polls, remains the only agreed model for elections and on that basis, urged those signatories to return immediately to talks.
UNSOM and its international partners welcomed the decision of the African Union Peace and Security Council to appoint a Special Envoy and recommended that this high-level representative arrive in Mogadishu to begin work, as soon as possible.
"We stand ready as partners to extend our support to this envoy, and meanwhile we continue efforts to bring the parties together," they said.
"We reaffirm our respect for Somali sovereignty, unity, territorial integrity, and independence," they stated.