Jack Trotter, from Newtownards in Co Down, Northern Ireland, was among those injured when a car ploughed into a crowd on Water Street in Liverpool during the Liverpool Football Club’s victory parade yesterday, Monday, May 26.

Trotter, who has been discharged from the hospital, told BBC News NI on Tuesday that he was in "absolute agony" after sustaining injuries to his back and leg.

Trotter and his girlfriend Abbie Gallagher had travelled to the parade in Liverpool with friends from Northern Ireland.

In a social media post on Monday night, Trotter wrote: "I'm writing this because I’ve got a million texts asking if I'm okay."

He said it's "crazy over here" and that he barely had any service.

"The parade was going unreal until the very end some absolute lunatic decided to floor it and drive his car through everyone," Trotter wrote.

"Unfortunately, I was hit however, I’m extremely lucky as I dodged the car just in time, however still got hit."

Trotter said he was in "absolute shock" at how an event like that could turn into "such  tragedy."

Trtoter said he was "okay" and "getting looked after," but added "just mental how it could've been a lot worse."

In a post about six hours later, Trotter thanked everyone for the kind messages.

He said he had been taken to hospital and was being held due to injuries to his back and leg.

"Currently in agony," he wrote, adding, "hopefully nothing too serious."

Officials said hundreds of thousands of people lined the streets on Monday evening to celebrate Liverpool Football Club’s victory parade.

However, just after 6 pm, Merseyside Police said they had been contacted following reports that a "car had been in collision with a number of pedestrians on Water Street."

Police said the car stopped at the scene and that a male had been detained. 

In a subsequent update, Merseyside police asked people not to speculate on the circumstances of the incident. 

"We can confirm the man arrested is a 53-year-old white British man from the Liverpool area," police said, adding that "extensive enquiries" were ongoing.

Chief Fire Officer Nick Searle, from Mersey Fire and Rescue Service, said on Monday that upon arrival at the scene, "crews were met with numerous injured people and four persons trapped under a vehicle.

"Our crews rapidly lifted the vehicle, removed people from beneath, and passed them to our Ambulance colleagues."

Searle noted on Monday night that 27 people were taken to the hospital by ambulance, including four children. One of those children, Searle said, sustained injuries deemed to be serious. 

On Tuesday, Assistant Chief Constable Jenny Sims of Merseyside Police said Water Street had been closed to traffic as part of a "robust traffic management plan" that was put in place months before the potential parade.

"It is believed the driver of the Ford Galaxy car involved in the incident was able follow an ambulance onto Water Street, after the road block was temporarily lifted so that the ambulance crew could attend to a member of the public who was having a suspected heart attack," Sims said.

She added that there was no intelligence to suggest that an incident of this nature would take place and that the incident is not being treated as terrorism.

Detective Chief Superintendent Karen Jaundrill confirmed on Tuesday a total of 65 casualties, many of whom required hospital treatment.

Jaundrill also announced that a 53-year-old man from West Derby had been arrested on suspicion of attempted murder, dangerous driving offences, and driving while unfit through drugs.