Police have been given more time to interview the 53-year-old man arrested following the incident at the Liverpool FC victory parade on Monday.
It has been confirmed that he has been arrested on suspicion of attempted murder, driving while unfit through drugs and dangerous driving offences.
Merseyside Police say they believe the driver of the car which hit a number of pedestrians tailgated an ambulance to enter a closed road.
“It is believed the driver of the Ford Galaxy car involved in the incident was able follow an ambulance onto Water Street, after the roadblock was temporarily lifted so that the ambulance crew could attend to a member of the public,” said Assistant Chief Constable Jenny Sims.
11 people remain in hospital but are recovering well and our thoughts are with all those affected by the events on Monday.