Police say they believe they have caught one of four people who raided a jewellery store in Sheung Shui on Wednesday evening and the man, 23, will be charged with robbery.

Jewellery worth HK$1.5 million was stolen from a shop on San Fung Avenue by a group of people wielding knives and hammers who escaped in a private car, officers said.

Weapons believed to be linked to the raid were later found in a car involved in a crash on Lam Kam Road, while clothes and masks officers suspect were worn by the robbers were found on a nearby hillside.

"Through our investigation, we suspect that the vehicle that we mentioned had been surveilling the crime scene a couple of days before the incident took place," Chief Inspector Law Like-him said at a media briefing.

"We suspect this shows it was a pre-planned, organised crime."

The suspect, who was arrested in Pat Heung in the early hours of Thursday, is expected to appear in Tuen Mun Magistrates' Courts on Saturday, police said.