No-frill carrier Indigo on Monday said the executives of its outsourced call centre had been suspended for denying tickets to a visually-impaired passenger and apologised to him for repeated denial of air tickets,terming the incident as shocking and unacceptable. A visually-challenged student of Mumbais Tata Institute of Social Sciences,Tony Kurian,was denied tickets repeatedly because of his impairment since late last year. In a statement,IndiGo President Aditya Ghosh said,Our outsourced call centre executives,who repeatedly denied facilitating Mr Kurians travel with IndiGo on grounds of the passenger being visually challenged,have been suspended. He said the airline had no such policy.