A car reportedly struck and injured pedestrians on London's Westminster Bridge on Wednesday, amid reports of shots fired outside of the U.K. Parliament. It was not immediately clear how many were injured. Reuters photographers showed "two people lying on Westminster Bridge, bleeding heavily."
BBC reported at "roughly the same time" an assailant, reportedly armed with a knife, was shot by police and a police officer was reportedly stabbed. Officials have not confirmed whether the two incidents are related.
Police have closed off roads to Parliament Square as both the Houses of Parliament and the Palace of Westminster went into lockdown. London Metropolitan Police said in a statement the attack is being treated "as a terrorist incident" until information suggests otherwise.