Two masked men have stolen cash in an armed robbery at a petrol garage in Denbighshire.
The men, wearing ski masks and carrying what appeared to be a handgun, struck at the Esso garage in Denbigh Road, Ruthin at 20.50 GMT on Wednesday.
The two members of staff were unhurt but police said they were left shocked.
North Wales Police have appealed for information and witnesses, while CCTV footage is being studied.
Staff at the garage were ordered into a back room by the men, who were wearing dark clothing.
Police said one robber was thought to have a handgun but it is not known whether the weapon was real or an imitation.
They have appealed for anyone who may have seen suspicious-looking vehicles or people in the area around the time of the robbery.
Det Chief Insp Steve Williams said: "Incidents such as these are extremely frightening for the staff and I urge anyone who may have seen anyone acting suspiciously in the vicinity or who may have seen any suspicious vehicles in the area before or just after the time of the robbery to contact detectives."
He added: "We want to reassure residents and businesses alike that we have a dedicated team working on the investigation."
The police helicopter has been involved in a search of the area, while house-to-house inquiries will be continuing.
Anyone who has information or who may have seen anyone acting suspiciously in the area before the robbery should contact officers at St Asaph CID on 101 or 0845 6071001 (Welsh line) 0845 6071002 (English line).
People can also contact Crimestoppers anonymously with information on 0800 555 111.