A/HRC/19/51 (d) Ease restrictions on movement, including by removing manned checkpoints and facilitating the work of humanitarian agencies; (e) Release all persons held in places of detention under opposition control, provide names of those released and those still in detention and ensure that they are treated humanely; (f) Cooperate with investigations into abuses that may have been committed by armed men under opposition command; (g) Refrain from attacking targets that provide essential services to the civilian population, vacate all public buildings and withdraw from public and private properties. 63. The High Commissioner recommends that the international community: (a) Call on all parties in Yemen to refrain from the use of violence and to resolve their political or sectarian differences through open, transparent and comprehensive dialogue with the support of the international community; (b) Encourage international, independent and impartial investigations into incidents that have resulted in heavy loss of life and injuries; (c) Heed the call for humanitarian assistance and provide financial support for the Yemen humanitarian response plan of 2011 and the joint United Nations stabilization plan. 17