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.
More top news
Mainly dry, with some sunny spells tomorrow.
Police say they are searching for four people after a suspected ram-raid robbery on a building society in Leamington Spa.
Yamaha rider Jorge Lorenzo set the pace in practice for Sunday's British Grand Prix.