A statement issued overnight by UN Spokesman, Stéphane Dujarric, said that Secretary-General Antonio Guterres, recalling that attacks against UN peacekeepers “may constitute a war crime,” called on the country’s authorities to investigate them and swiftly bring those responsible to justice.

A Rwandan peacekeeper serving the UN Multidimensional Integrated Stabilization Mission in the Central African Republic (MINUSCA) was killed and eight others of the mission were injured during the incident in the capital, Bangui.

The incident followed a joint operation launched on 8 April by MINUSCA and the Central African forces and police to disarm and arrest heavily armed criminal groups, Dujarric said, noting that the Secretary-General offered his deepest condolences to the family of the bereaved, as well as to the Government of Rwanda, and wished a swift recovery to the injured.

The incident also coincided with a visit to the CAR by UN Under-Secretary-General for Peacekeeping Operations, Jean-Pierre Lacroix, and African Union Commissioner for Peace and Security, Smail Chergui.

In their statement issued on Wednesday, the two leaders said: “We, representatives of the African Union and the United Nations, have decided to undertake a joint visit to the Central African Republic to express our solidarity and full support for the Central African people and the peace process in the Central African Republic.”

They also condemned the attacks that killed and wounded the peacekeepers.

The CAR has been plagued by decades of instability and fighting. A renewed violence erupted in December 2012 when the mainly Muslim Séléka rebel coalition launched a series of attacks. A peace agreement was reached in January 2013, but the rebels seized the capital, Bangui, in March, forcing President François Bozizé to flee.

A transitional government has since been established and entrusted with restoring peace. The conflict, however, has taken on increasingly sectarian overtones as the mainly Christian anti-Balaka movement took up arms and inter-communal clashes erupted again in and around Bangui.