see here for an interesting report:

http://www.guidetoaction.org/parker/ahm-aff.html

just one extract for your information:

17. In 1985, I worked with the United Nations Sub-Commission on Prevention of Discrimination and Protection of Minorities to bring to its attention the widespread violations of human rights in Pakistan, especially the clear persecution of Ahmadi Muslims. The Sub-Commission agreed, and in its resolution 1985/21, condemned Pakistan for its persecution of Ahmadi Muslims indicated by Ordinance XX and highlighted the risk of a mass exodus of Ahmadi Muslims and others from Pakistan because of that persecution.