A security guard who deliberately rammed his car into a crowded pizzeria in France told investigators he was a suicidal habitual drug user and had consumed "a large quantity" of painkillers the day before the act that killed a girl, a prosecutor said.

A man who may have been trying to kill himself has rammed his car into a pizzeria east of Paris, killing a 13-year-old girl and injuring her younger brother and at least 11 others, authorities said.

A 13-year-old girl was killed and at least five people injured when a driver rammed his car into a pizza restaurant in a small town east of Paris, French police say.