A/HRC/28/3 88. OHCHR was engaged in mediation processes to defuse tensions between authorities and communities; for instance, in Colombia, it participated in several negotiation platforms, at the national and local levels, contributing to peacebuilding and to upholding the rights claimed by social movements. 3. Human rights, peace and security 89. Engagement with the Security Council has significantly increased in the past three years. OHCHR thematic and country briefings continued to have a clear focus on prevention and accountability. They helped to shape the response of the Organization to crises, highlighted human rights protection challenges, provided early warning signals and proposed actions. During the period under review, my predecessor briefed the Security Council in a general debate on conflict prevention, and on a number of country situations, in particular in the Central African Republic, Libya, Mali, South Sudan and the Syrian Arab Republic. I also briefed the Council for the first time in November on the situation in Iraq. The Assistant Secretary-General briefed the Council on Burundi, South Sudan and Ukraine. 90. OHCHR worked to enhance the response of the United Nations to the protection crisis in the Central African Republic, and to ensure that protection of human rights was at the core of the MINUSCA mandate. OHCHR supported the deployment of human rights protection and monitoring capacity during the start-up phase of the operation in parallel to planning for a full-fledged human rights component. To support the transition from the African-led International Support Mission in the Central African Republic (MISCA) to MINUSCA, OHCHR, alongside the Department of Peacekeeping Operations, trained MISCA contingents on human rights and the protection of civilians. OHCHR also supported UNAMID and the Department in the streamlining of mandated activities. It participated in the strategic review for the revaluation of the United Nations Organization Stabilization Mission in the Democratic Republic of the Congo (MONUSCO), and engaged in the civilian staffing reviews exercise led by the Department of Field Support mandated by Member States for the human rights components of MONUSCO, the United Nations Assistance Mission for Iraq and the United Nations Stabilization Mission in Haiti. 91. Based on its experience in integrating human rights into peace and security, OHCHR held a consultative meeting with the Commission of the African Union to identify areas for OHCHR potential support to strengthen human rights integration into African Union peace support operations, including through integration within the United Nations Office to the African Union. OHCHR was also actively involved in the lessons learned exercise on transitions from the African Union peace operations to United Nations peacekeeping operations in the Central African Republic and in Mali, as requested by the Security Council in its resolution 2167 (2014). OHCHR will also engage with the High-level Independent Panel on Peace Operations with a view to advocating for a strengthened role of human rights within peace missions. 92. OHCHR supported the implementation of the human rights due diligence policy on United Nations support to non-United Nations security forces, advising United Nations peace missions, United Nations country teams and individual United Nations entities on developing procedures and risk assessments and facilitating lessons learned exercises. The policy effectively allowed principled and effective engagement in situations where the risk of serious human rights violations by regional and national security forces with which the United Nations was partnering was high. 4. Humanitarian action 93. OHCHR strengthened its engagement in humanitarian action. It remained engaged with the Inter-Agency Standing Committee, particularly with regard to the implementation of its transformative agenda and the handling of level-3 crises. The contribution of OHCHR 17