The GuardianSam Jones@swajonesThursday 6 August 2015 16.40 BSTPhoto: Haitian migrants and Dominicans of Haitian descent protest outside the National Palace in Santo Domingo while waiting to register in the republic's controversial 'regularisation' programme. Photograph: Ricardo... moreThe GuardianSam Jones@swajonesThursday 6 August 2015 16.40 BSTPhoto: Haitian migrants and Dominicans of Haitian descent protest outside the National Palace in Santo Domingo while waiting to register in the republic's controversial 'regularisation' programme. Photograph: Ricardo Rojas/ReutersSenior adviser to Dominican presidency issues strong rebuttal of expulsion claims but concedes ‘isolated cases and events’ have breached official protocol