A man in his 50s was "knocked unconscious" during an assault in Stevenage, police have revealed.
The incident happened between 7.15am and 7.45am on Friday (June 12) in Stevenage Railway Station's multi-storey car park.
Hertfordshire Police are now appealing for witnesses and anyone with information to come forward.
The man was unconscious for a short period of time before he was helped up by members of the public.
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The suspect is described as a pale-skinned man, aged between 30 and 35 and approximately 5ft 6ins to 5ft 9ins tall.
He was said to be of slight build and wearing a dark blue tracksuit top, either matching tracksuit bottoms or jeans, and white trainers.
PC Neil Gooray said: "Our enquiries are ongoing and I am appealing for anyone with information to please come forward.
"The victim had to rush to get his train and was therefore unable to get the details of the people who helped him after the assault.
"If this was you, please contact me via Neil.Gooray@herts.police.uk as you may hold vital information to help our investigation."
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