'It is critical that all parties show restraint in words and in actions with strict adherence to the peace agreements, to re-establish the necessary confidence, and that they articulate a common vision of the peaceful path ahead,' Landgren said.

She also called for a speedy resolution of integrating thousands of Maoists combatants who remain in UN-monitored camps across the Himalayan nation.

The resumption of the work of the Special Committee on Army Integration is also linked to the UN mission's own exit strategy, she said.

Of the nearly 31,000 Maoist combatants, 19,602 passed through the rigid UN verification process, which, in theory, qualified them for integration into the Nepalese security force.

'Determining the future of the former Maoist army combatants is absolutely critical to building a lasting peace in Nepal,' Landgren said.

The UN also disqualified just over 4,000 combatants, a third of them minors who remain in Maoist camps.

Earlier this month, the Nepalese government formally said it had started the process of rehabilitating the minors and other disqualified combatants into society.