Those being questioned by police are:
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A 23-year-old man, from Canvey, on suspicion of causing serious injury by dangerous driving, theft of a motor vehicle and driving while unfit through drink or drugs
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A 29-year-old man, from Westcliff, on suspicion of causing serious injury by dangerous driving, theft of a motor vehicle, possession of a Class B or Class C drug, and being in charge of a vehicle while unfit through drink or drugs
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A 39-year-old man, from Canvey, on suspicion of causing serious injury by dangerous driving and driving while unfit through drink or drugs.
Essex Police said the paramedic and police officer suffered serious injuries.
It said the crashes happened on the southbound carriageway of the A130, between the Rayleigh Spur and Sadlers Farm roundabouts.
Officers closed the A130 between Sadlers Farm and the A1245 Bonville’s Roundabout leading to the A13, while it carried out an investigation.
The roads have since been reopened.
Ch Supt Morgan Cronin said: “The thoughts of everyone at Essex Police are with the emergency workers injured while responding to this incident – both they and their families are being provided with support from the force.”
Policing minister Sarah Jones said her thoughts were with the officers, their families, colleagues and witnesses to the incident.
“I hope they make full recoveries and inquiries quickly determine the cause,” she added in a post on X.
