YorkshireLive reports.Fire crews are currently working to establish what chemical has caused the illness, and the affected officers are said to be 'recovering' after receiving medical treatment.A man in his 30s — who police were entering the property to resuscitate — has been taken to the Northern General hospital in the north of the city, and is in a serious condition.
There was reported to be an air ambulance around twenty emergency vehicles attending the scene earlier in the evening.According to The Sheffield Star, unconfirmed witness reports have described people being "pulled out" of a nearby woods, stripped down to their underwear, and "sprayed down" by firefighters.
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