A robbery attempt was foiled on Monday after a Thane-based jewellery shop owner visited the shop at odd hours for some work and caught one of the accused red-handed. The incident took place at Chendani-Koliwada in the Kopri area. A gang of robbers had rented an adjacent to the jewellery shop on the pretext of setting up a farsan outlet but in six months the burglars drilled a hole in the shop`s wall. On Monday around 1.30 pm, Dilip Kataria, owner of Bhawani Jewellers, visited the shop to collect something. When he opened the shop shutter, he was shocked to find a man inside the shop. He started shouting, nabbed the man and called the Thane Police Control room. Kopri cops rushed to the spot.