from Sky News:
1) vehicle ran over series of pedestrians on bridge - up to 1 dozen ppl estimated
2) same vehicle smashed into people and front railings in front of Houses of Parliament — further casualties there
3) attacker left vehicle, managed to run into grounds “Old Palace Yard” — stabbed a police officer — other officers opened fire and shot attacker
Only one attacker definitely reported, same guy seems to have driven car and wielded the knife attack
One incident, 3 component parts
Police treating attack as “terrorist incident until we know otherwise”
Sounds like a single pointed kinetic action.
Police think they have the sole attacker in custody (not saying if he is alive or not). They are conducting thorough searches of buildings in the area but so far have no basis for thinking there is more than one attacker.