Two post office workers were threatened with what was thought to be a firearm and had their hands and feet tied up in a raid in Surrey.
Police believe the man stole cash, scratch cards and cigarettes from the post office in Bletchingley High Street at about 06:15 GMT.
Detectives have released a CCTV image of a man they want to speak to.
Det Insp Antony Archibald said the man was wanted in connection with the raid and people should not approach him.
He urged people to contact officers immediately if they could identify him or knew his whereabouts.
He said officers deployed to the scene had searched the area and were continuing to make inquiries.
Detectives released a CCTV image of a man they want to speak to