The emergency services were called to Park Hill in Sheffield on Monday night, where a man was found seriously injured.... Officers for South Yorkshire Police forced entry to the flat and gave the man emergency CPR. However, they soon “ started suffering ill effects from an unknown chemical ”, the force said.“ All the officers are recovering ”, it added, while the man, in his 30s, was taken to Northern General Hospital in a serious condition. This morning, YorkshireLive reported the officers had