The Times of India is reporting that website of the Indian Railway Catering and Tourism Corporation (IRCTC) has been hacked and data belonging to around 1 Crore customers is feared to have been stolen by the hackers.

An IRCTC source said, “The data is a valuable asset and can be sold to corporations who may use it for targeting potential consumers.” IRCTC officials say the Maharashtra government has been alerted. The state’s additional chief secretary (home), KP Bakshi, confirmed to TOI that the state police had alerted the railways, but refused to give any more details.

A subsidiary of the Indian Railways, IRCTC is the largest e-ticketing portal in the country and holds the record for nearly 13,40,000 tickets booked in a day in April 2015. It’s revenue from ticketing sales was over $3 Billion in 2015.