West Midlands Police say the motive for the attack is unclear. The man has been identified and his family are being informed.
Cockshut Hill and the surrounding area is likely to remain closed until tomorrow.
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Strong winds and heavy rain overnight.
Rain, hill snow overnight. Becoming very windy towards dawn.
The Y Not festival in Derbyshire, which was abandoned after its site turned into a sea of mud, is to make a return this summer.