A bag with a computer and two USB drives containing police security plans for the Paris Olympics was stolen from a train at the Gare du Nord station in the French capital, AFP reported, citing news.ro.

The bag belonged to an engineer from Paris City Hall, police said, confirming a report by BFM television, adding that he had placed the bag in the luggage compartment above his seat.

As his train was delayed, he decided to change, and that’s when he discovered the theft.

The engineer said his work laptop and two USB drives contained sensitive data, including municipal police plans for Olympic security.

The transport police of the region is conducting an investigation.

Paris City Hall was not available for comment when contacted by AFP.

Two thousand municipal police officers will be deployed during the Games, for a total of about 35,000 security forces will be on duty every day during the Olympic Games, which begin on July 26.