Two men believed to be pest controllers have died in a chemical spillage at a chicken factory.

They were discovered close to Banham Poultry in Attleborough, Norfolk, where they were reportedly both working on the site with a subcontracted pest control company.

The factory is now in lock-down and local train services have been halted following reports of the suspected chemical spill at the site.

Harvey Barker, from nearby Travis Perkins, said: "You can't really see anything but there's a police car parked to side of train track.

"There's police there trying to keep people away from the track."

The deceased's next-of-kin have been made aware and are being supported by family liaison officers.

No-one else was injured in the incident, which occurred at around 1.10am Thursday at Banham Poultry, where the jobs of more than 1,000 workers are at risk.

Detective Chief Inspector Stu Chapman of Norfolk Police said: "On behalf of Norfolk Police and other emergency services, I offer my condolences to the friends and families of the men killed in this incident and our thoughts are with them at this difficult time.

"Colleagues from Norfolk Fire Service continue to make the scene safe so that detailed investigations can begin between police, fire, and the Health and Safety Executive (HSE), to understand the circumstances which lead to the men's deaths."