25. Where critical difficulties arise relating to such support, United Nations entities should report immediately to the relevant decision-making United Nations officials and legislative bodies, as appropriate, on developments related to the elements of the risk assessment that present the Organization or its personnel with the risk of being associated with grave violations of international humanitarian, human rights or refugee law. The United Nations entities involved should report on the circumstances, any measures taken to mitigate or remedy the situation and recommendations for follow-up action. D. Mitigatory measures 26. If the United Nations receives reliable information that provides substantial grounds for believing that a recipient of United Nations support is committing grave violations of international humanitarian, human rights or refugee law, the United Nations entity providing support should bring these grounds to the attention of the relevant national authorities with a view to bringing those violations to an end. 27. If, despite intercession by the United Nations entity concerned, the United Nations receives reliable information that provides substantial grounds to suspect that the recipient entity is continuing to engage in grave violations of international humanitarian, human rights or refugee law, then the United Nations entity must suspend or withdraw support from the recipient. E. Operational challenges 28.