Burglars stole two computers containing confidential information from a power company's nuclear energy research site.
The burglary, discovered on Monday, was at the Électricité de France's office in Chatou west of Paris, even though it is protected by highly secure anti-theft systems. Police suspect industrial espionage.
An EDF spokeswoman said that the office is for research purposes only. The company said that the two laptops "contain no information about the operating systems of nuclear plants".