Jurors were taken to two isolated villages yesterday and shown the shack in which three men are accused of having stashed Hong Kong's biggest cache of high explosives. The men are jointly charged with possessing almost 820kg of explosives. The mixture of ammonium nitrate, fuel oil and TNT is said to have had the potential to blow up any building in the SAR and cause death and destruction over a 300m radius. Prosecutor Michael Arthur led jurors through the dilapidated villages of Tai Wo, near Sheung Shui, and Ma Tso Lung, on the border, accompanied by lawyers and the first accused in the case, Chan Sum-yau, 47. Chan was hooded and guarded by up to 15 police officers, some armed with machine-guns. Police found the explosives in a 'sham' village house allegedly owned by Chan and which Mr Arthur had described as among the 'deceptions which formed the backdrop to these [criminal] activities'. Chan is alleged to have bought the rusted, ivy-covered shack under a false name and had a secret house built inside for storing the explosives. He went to the site yesterday to clarify points with his lawyer. Chan and Wong Fung-kei were arrested after a police raid on the Ma Tso Lung shack on January 18 last year. They were caught moving plastic barrels meant for storage of the explosives from the Tai Wo compound, it is alleged. The cache was in 326 bags inside polystyrene boxes marked 'fish'. Wong, 44, and the other accused man, Lau Cheuk-fan, 32, remained in custody. Lau was arrested at his Sai Kung home. All three - alleged accomplices of a man referred to as 'Person A' - have pleaded not guilty to possession of explosives with intent to endanger life or property. Despite 11 days of virtually uninterrupted surveillance, police did not catch Chan on videotape. Traces of ammonium nitrate were allegedly found on the bodies or clothing of all three. The case continues today in the Court of First Instance before Mr Justice Peter Nguyen.