RBS have pledged to offer a reward of up to £15,000 for any information that leads to the arrest and conviction of the person responsible for a robbery last Wednesday.

The robbery, in which a four-figure sum of money was taken, took place at around 09.30am hours on June 17, at the Royal Bank of Scotland on High Street, Dumbarton.

Police were stopping members of the public as well as passing vehicles to appeal for information and show them CCTV images of a man they want to speak to in connection with the incident.

Detective Sergeant Stuart Gillies said: “Yesterday’s revisit to the scene was definitely worthwhile and we spoke to members of the public in the surrounding area in an attempt to gather more information about this incident.

“Our enquiries are at an early stage and I would continue to appeal to anyone who knows who is responsible to come forward.

“Somebody knows who committed this crime and we understand that RBS are offering a significant financial reward for any information that leads to the arrest and conviction of the person responsible.

“I would like to reassure the community that incidents of this type are very rare in the area and we will continue to work with our local partners to deter criminals and keep people safe.” The thief brandished a knife at staff before making off with the cash in the direction of the River Leven.

No one was injured and police are yet to arrest anyone for the theft.