At least two people were reportedly taken hostage in Paris on Tuesday, CNN affiliate BFMTV reported. A Paris police official told CBS News there was no immediate indication of a link to terrorism, however members of the force's elite serious crime unit, known as the BRI, were on the scene.
More than a dozen heavily-armed police officers, firefighters and rescue workers were stationed outside the building where the hostages were being held, located in a crowded neighbourhood in the centre of the French capital.
The standoff began around 4:00 pm (1400 GMT), with BFM television reporting that the man had entered the offices of a start-up company on the Rue des Petites Ecuries, a gritty area of the bustling 10th arrondissement.
Scots hope England ODI win boosts Test bid
We can't rest on our laurels. "They are trying to turn around the image of the game in their country, and we're all for that". We're at No.1 in the world, so that gives us a huge amount of confidence.
Why Lopetegui appointment is risky for Madrid and Spain
Lopetegui, who has been in charge of the national team for the past two years, has agreed a three-year contract at the Bernabeu. The Spanish giants broke the news in a Tweet on Tuesday.
Canada's FM slams U S attacks on trade, diplomacy
Hayden added that Trump's actions left him with "a mixture of sadness and, frankly, anger, because no country deserves to be treated that way".
Police also did not confirm reports that one of the hostages was injured. However, his motivation for such an encounter was unknown.
"The man claims to be in possession of a bomb and a handgun", France Bleu said, adding that the hostage-taker demanded to speak with Iranian embassy.
An armed police officer and a sniffer dog search the area. An Interior Ministry official said negotiations with the suspect were taking place.