Kolkata/ New Delhi: Around 25 flights have been delayed at Kolkata airport as its Internet server has gone down since 5.30 pm on Monday, a senior official of the Airports Authority of India (AAI) said. The airlines, therefore, have been issuing boarding passes manually since 5.30 pm, the official added. The Airports Authority of India owns and manages more than 100 airports — including the Netaji Subhash Chandra Bose International Airport in Kolkata — across the country. Also Read – Bengal family worships Muslim girl as Goddess Durga in Kumari Puja”The Internet server has been down since 5.30 pm and it is likely to start working from 10.30 pm today (Monday). Around 25 flights have been delayed in between 5.30 pm and 9 pm by an average time of 20-25 minutes,” said the Airports Authority of India official. The official added that the IT team of the Airports Authority of India is working diligently to resolve the issue at the earliest. “The Local Area Network (LAN) connection somehow got disconnected. Due to the technical snag flight operations have been delayed and as issuing of boarding passes and other formalities are being done manually. Our engineers are working to fix the problem soon,” said Kaushik Bhattacharya, Director of Netaji Subhas Chandra Bose International (NSCBI) Airport, Kolkata.