Police are trying to work out whether two robberies at Co-op in Croxley stores are linked.
In the first attack, two men armed with a knife, targeted the shop in Watford Road at around 10.25pm on October 31. Three days later a similar robbery took place at the Co-op in New Road, shortly after 10.30pm.
In both cases, the two men entered the store and threatened staff with a blade before stealing cash and making off.
Detective sergeant Steven Boddy, from the Three Rivers Local Crime Unit, said: “Thankfully no one was injured during the incidents. We are currently working to establish whether the offences are linked and our priority is to trace those responsible. We are appealing for anyone with information which may assist our enquiries to please come forward.
“We are conducting high visibility patrols in the area and working directly with local stores around crime prevention and safety measures, for both staff and shoppers alike. If you have any concerns, please don’t hesitate to contact us.”
Anyone with information about the robberies is asked to contact Three Rivers Local Crime Unit via the non-emergency number 101, quoting crime reference 41/51790/18. You can also report information online at www.herts.police.uk/Report