According to Yahoo its 6 dead.
http://news.yahoo.com/four-dead-paris-suburb-building-explosion-200657554.html
Your report said one hour before report in my post ... Wonder why the one hour time differential in the reports. Typo?
Creek, my report is out of Asia so might be mistake in my report.
The first pic I saw looked like a wall collapsed. But pics at your yahoo link look like half the building collapsed judging by the amount of rubble and the distance from the street of the rest of the building.