Migrants not aware of their rights have been falling prey to trafficking and exploitation, and coordination among stakeholders is vital to address the issue holistically, an expert on the subject said in light of cases of suspected human trafficking recently reported from Gujarat. It will be appropriate to have a separate investigation agency for dealing with human trafficking offences, former Indian Police Service Officer P M Nair, who was the project director of a study conducted by the Tata Institute of Social Sciences (TISS) on human trafficking in vulnerable districts of India, told PTI.