A Jaguar Land Rover worker has been taken to hospital after 28 people were assessed in a suspected chemical incident, the ambulance service said.
A number of staff felt unwell at the site in Lode Lane, Solihull, after a floor sealant had been applied at part of the Solihull site.
The person taken to hospital had “minor symptoms” West Midlands Ambulance Service (WMAS) said.
JLR said “a small number” of workers were suspected of inhaling fumes.
A spokesman for the firm said the incident had ended and there were “several theories” about the cause, but an investigation was under way.
He said work had been carried out in a production area on Saturday.
“We can confirm that a small number of contractors and employees were triaged by West Midlands Ambulance Service,” he said.
WMAS said it carried out its policy of “remove, remove, remove” and got people out of the building.
“Most staff felt symptoms reduce once out of the affected area and in fresh air,” it said.
West Midlands Fire Service was informed and advised on the incident but did not send crews.
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