An area in Paris has been on lockdown after an armed man reportedly took several people, including a pregnant woman, hostage in one of the buildings, local media report.
Anti-terrorist police are surrounding the Mixicom computer store in the French capital's 10th arrondissement, close to the Gare du Nord Eurostar hub.
The man also claims to have an accomplice outside the building.
There were two people taken hostage, according to initial reports.
France has been on high alert after a series of jihadist attacks in the past three years, most recently a Saturday night knife attack by a man in Paris last month in which one person was killed.
The police said there was no indication that the incident was terrorism-related, but declined to elaborate on the hostage-taker's motive.
The male suspect reportedly asked to speak with the ambassador of Iran, Lefebvre said. Police swept vehicles in the area with a device but found nothing, he said. That hostage was also reportedly doused with gasoline and hit in the face, he said.
There were no immediate details on the age, appearance or nationality of the hostage taker.