An armed man in Paris claiming to have explosives, has reportedly taken at least 3 people hostage.
The hostages are being held in the internal courtyard of the building, which contains a mix of offices and residential apartments.
"Officials will be trying to start a negotiation with the man", police union official Yves Lefebvre told BFM TV, which reported that the incident did not appear to be terrorism-related.
A street in the French captial has been closed off as police cordon the area.
The Evening Standard reports the attack doused the remaining two hostages in petrol.
Videos and images circulating on social media show several police vehicles as well as heavily armed officers at the scene.
There were no immediate details on the age, appearance or nationality of the hostage taker.
The hostage was allegedly hurt after being hit with a wrench as the hostage-taker, who has not been identified, entered the tech store on the afternoon of June 12. "His demands were really vague and incoherent", said an interior ministry official.