The United Nations Secretary General says the culture of impunity needs to end in South Sudan.

Today marks one year since the conflict broke out in the country.

In a statement, Ban Ki-moon said he is dismayed and saddened that the two warring parties are yet to reach a comprehensive peace agreement. He said this is tragic and unacceptable.

“The killing must stop now. The very premise of the country’s independence struggle – a new beginning that was supposed to be founded on tolerance, good governance, accountability and unity – is disappearing before our eyes,” read the statement.

“The leaders of South Sudan have allowed their personal ambitions to jeopardize the future of an entire nation.”

Mr Ki-moon urged the warring parties to agree to an inclusive, power-sharing arrangement to begin a transitional phase of governance.

“They must end the culture of impunity if reconciliation and a sustainable peace are to be achieved,” the statement added.

He said UN will fully support the peace process, protect civilians and provide humanitarian assistance.

Tens of thousands of people have died, 1.9 million have been displaced and millions more have become vulnerable to food insecurity since conflict broke out in the country, according to the UN.