The U.N. special envoy for Libya said Friday that recent security arrangements have led to only limited improvements in Tripoli, cautioning that instability continues in the capital and across western Libya.

"Following the agreement on new security arrangements in Tripoli, the security environment in the capital has stabilized to a certain extent,” Hanna Tetteh told the U.N. Security Council.

"The truce continues to hold; however, the situation in Tripoli and western Libya remains fragile, with sporadic outbreaks of armed clashes in areas in southern Tripoli and elsewhere,” she said.

"I urge all relevant actors to work together towards implementing the security arrangements agreed upon and advance the necessary reforms to achieve stability,” she said.

"We welcome Libya’s Universal Periodic Review process that took place in the Human Rights Council on Nov. 11 and stand ready to work closely with Libyan authorities and stakeholders on the recommendations that were made,” she added.