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Vogele, who had served in India, was deported soon after he landed in Ahmedabad on January 22.
He was allegedly told he had "no right" to enter India and was "deported" without explanation. His passport was returned in Geneva.
In a letter to Sibi George, Indian Ambassador to Switzerland, Vogele demanded to know the reason for the "blacklisting".
Though there was no official word on why Vogele, who in the past represented the Swiss Development Cooperation in India, was deported, media reports suggested it could be because of his association with the SDC.
Reports said SDC was understood to have funded a Dalit rights organisation-Navsarjan Trust- whose Foreign Contribution Regulation Act (FCRA) licence was cancelled in 2016 over allegations of engaging in "undesirable activities" that could disturb harmony.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)