Armed robbers have stolen cash from two shops.

Two men threatened staff at the Co-op stores in Watford Road on October 31 at 10.25pm and in New Road at 10.30pm on Saturday; both in Croxley Green.

On both occasions, the men had a knife and were able to grab cash and run off. No one was injured.

Police do not know if the robberies are linked at this stage and it is not the first time the Co-ops have been targeted by criminals.

Patrols in the area are being increased.

Detective Sergeant Steven Boddy, from the Three Rivers local crime unit, said: “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 101, quoting crime reference 41/51790/18.