An attacker was also killed, according to the police, who said “a full counterterrorism investigation” was underway. - From https://www.nytimes.com/2017/03/22/world/europe/uk-westminster-parliament-shooting.html?smid=tw-nytimes&smtyp=cur&_r=0
Olly Grender, a member of the House of Lords, said that lawmakers were staying put.
The taxi driver rang the emergency services, and people rushed to help.” Andrew Bone, executive director of the Responsible Jewellery Council, an industry standards group, was on a bus heading toward Victoria Station when it was stopped at the edge of Parliament Square.
Seeing the commotion, he at first assumed that an action movie was being shot, but quickly discerned the gravity of the situation as the bus was evacuated and he saw the vehicle on the bridge, which had crashed a railing, the air ambulance.
I saw no panic.” Martin Vickers, a member of the House of Commons, was in a passageway in Parliament when he heard loud noises.
Jeremy Shapiro, a former State Department official now at the European Council on Foreign Relations, said that the London attack was consistent with the recent pattern of attacks in which a vehicle was used to kill people, citing attacks in France, Germany and Israel.