A young child has sustained “life-changing injuries” in a suspected hit and run involving a motorbike.
Police received a report of a serious collision on Central Drive, Shotton, shortly after 5.30pm.
North Wales Police is attempting to locate the suspect, who officers say failed to stop after the collision.
Three people have been arrested on suspicion of perverting the course of justice.
The child was taken to Alder Hey Children’s Hospital in Liverpool by air. The force said they have sustained “life-changing injuries” and remain in a critical condition.
The road remained closed on Wednesday evening as officers carried out investigations.
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Chief Inspector Trystan Bevan said there was a “heavy police presence” in the Shotton area as officers attempted to locate the suspect.
The force is asking anyone who witnessed the incident, or was travelling in the area at the time and has dashcam footage, to get in touch.