villejuif france two people arrest police find products use make explosives flat south paris wednesday french interior minister gerard collomb say products find flat villejuif could use make unstable explosive tatp one source close investigation say tatp use militants several attack western europe recent years include manchester may brussels 2016 paris 2015. gas bottle also find flat source say police raid follow tip craftsman collomb say statement one source say locksmith saw chemical products tool look flat two people arrest drive small van belong flat tenant police source say france counter-terrorism prosecutor charge investigation judicial source say story refiled correct typo paragraph two arrest french counter-terrorism raid near paris