Via BBC:
Bernard Cazeneuve said on Tuesday that two men, aged 20 and 24, were arrested on 19 December and were being held for questioning.
Both are thought to have had contact with another Frenchman, currently believed to be in Syria.France saw its worst attacks in decades last month, with 130 killed in Paris.
Speaking in the southern city of Toulouse, Mr Cazeneuve said 10 attacks had been foiled so far this year in France.
He said the investigation into the latest alleged plot south-west of Paris will look into whether the Frenchman in Syria, thought to be a jihadist, ordered the attack.