paris france open counter-terrorism inquiry man wield knife attack soldier paris subway station friday late incident target troop protect capital transport hubs tourist sit paris european capitals high alert wave attack past years islamist militants many inspire islamic state paris incident occur hours several people hurt london underground station witness report blast police treat terrorism incident assailant paris wrestle grind arrest soldier part operation sentinel force deploy wake lethal islamist attack france escape unhurt police say attack happen 6.30 a.m. 0430 gmt morning rush hour get way chatelet subway station tens thousands commuters converge paris sprawl suburbs every day government spokesman christophe castaner say investigation handle counter-terrorism specialists source close investigation say assailant moroccan-born 40-years-old know criminal background police raid address link suspect ongoing source add half dozen attack troop belong operation sentinel early august man ram car group soldier patrol wealthy paris suburb levallois-perret france announce thursday 7,000-strong force adapt make mobile movements less predictable days early interior minister gerard collomb say security agencies thwart several big plot year include one plan strike paris night club late august islamist militants kill 230 people wave attack french soil since early 2015 dozens kill attack london manchester brussels french war plan carry bomb raid islamic state strongholds syria iraq militant group urge followers target france french media say chatelet aggressor shout reference islamic state attack soldier knifeman attack soldier paris subway terrorism probe open