Islamic State has claimed responsibility for yesterday's terror attacks in central London, according to the Amaq news agency.
A spokesperson said a "soldier of the Islamic State" carried out the attack, adding that he was "executing the operation in response to calls to target citizens of coalition nations."
This could be a reference to the coalition forces who are backing Iraqi troops in their fight against Isis. The jihadist group has suffered several defeats in recent months, and been forced to concede vast swathes of territory.
A man drove a car into pedestrians on Westminster Bridge before stabbing a policeman outside Parliament. Five people, including the attacker, have been killed.
Eight people have been arrested in raids in London and Birmingham as the investigation into yesterday's events continues.