Police were called at just after 12pm today (Tuesday 19 November) to reports of concerns for eight people travelling in a lorry on the A14.
Officers stopped the vehicle near Brampton Hut.
The air ambulance attended the scene and the road has been closed while emergency services deal.
Three people are being taken to hospital but no one is believed to be seriously injured.
A man has been arrested in suspicion of assisting unlawful immigration.
Immigration services have been notified and police enquiries continue.
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