A 34-year-old man arrested on suspicion of robbery at The Mount, Milford Haven, has been released under investigation.
The man was arrested on Monday, November 26 after the report of a robbery involving a Post Office cash driver.
Earlier this week the police issued an appeal for members of the public to come forward with further information.
Anyone who witnessed this incident or has information as to the whereabouts of the second man is urged to contact police immediately on 101.
Information can also be given anonymously to Crimestoppers on 0800 555 111.
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