In the first arrests since the two-year-old scandal made headlines worldwide in December, Mas and a second executive at his now defunct company Poly Implant Prothese (PIP) were seized at their homes in southern France shortly after dawn.
The detention could lead within hours to Mas being placed under formal investigation on suspicion of manslaughter and causing bodily harm. That could in due course lead to criminal charges, which would carry longer sentences than those he now faces in a fraud case expected to be tried around October.