The youngest victim injured in the Liverpool parade crash on Monday is nine years old, police have said.
They added that the oldest is 78, with all 79 people injured understood to be British.
Seven remain in hospital in a stable condition.
Merseyside Police declined to say what drug the 53-year-old man arrested over the incident is alleged to have taken.
“We wouldn’t go into this detail at this stage of the investigation,” the force said.
Police are still questioning the driver and were granted further time in an extension on Wednesday.
Officers have until Thursday evening to question the man from West Derby.
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He is in custody on suspicion of attempted murder, dangerous driving and drug driving.
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