Concern is growing for a 91-year-old Storrington man who has not been seen since Thursday night.
Gordon Witney enjoys walking and police believe he may have gone to the Downs or taken a bus to Horsham or Worthing.
The Sussex Police helicopter has been used to search the Storrington area and officers have now mounted a search on the ground.
Mr Witney is white, 5ft 3in tall, slim, and looks younger than he is.
He has dark hair and was thought to have been wearing a dark suit-type jacket, a white shirt and fawn or tan coloured trousers.
Anyone who has seen him should call police on 0845 6070999.
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