london eleven people injure saturday car collide pedestrians near london natural history museum one capital busy tourist areas police douse concern terrorist attack say road traffic incident police say believe car mount pavement outside popular attraction west london collide number pedestrians officer arrest man age 40s scene question suspicion dangerous drive take hospital treatment britain suffer five attack blame terrorism far year three involve vehicles incident area pack tourists weekend prompt concern collision deliberate act incident entirely road traffic investigation terrorist-related incident police statement say london ambulance service say treat 11 people mostly head leg injuries nine take hospital police say none injuries life-threatening life-changing majority hospitalize discharge unverified footage scene show man pin grind near crash black toyota car oliver cheshire model fianc british pop singer pixie lott tell daily mail newspaper one help detain man say three female passengers car tell private-hire taxi drive pavement hit 11 12 people guy scream tell paper look really shock get car grab three us grab someone phone police cheshire late write twitter thank message everybody ok. thank men help pin police come quickly neither police transport london run city transport system would comment status vehicle thank first responders incident afternoon action members public thoughts injure prime minister theresa may say twitter britain second high security alert level mean attack militants consider highly likely march man drive car pedestrians london westminster bridge kill four stab police officer death ground parliament three islamist militants drive people london bridge june stab people nearby restaurants bar kill eight month van drive worshippers near mosque north london leave one man dead eleven injure car crash near london museum terrorism rule