The incident took place last week when Pradeep Raj, an international athlete with disability, approached an immigration counter of Delhi's IGI airport meant for disabled people.
Upon checking his medical certificate, the immigration official, a sub-inspector with Delhi Police, was not satisfied with it and wanted to know what his specific disability was and allegedly humiliated him.
Raj, a recipient of a national youth award from President Pranab Mukherjee and general secretary of the Association for Disabled People, is handicapped.
Upon his return from South Korea, Raj complained to Union Home Ministry who initiated an enquiry.
Pending the completion of the enquiry, the sub-inspector of Delhi Police, who was on deputation to the Immigration department, has been sent to police lines and disciplinary action was being contemplated against him, a senior official said.