Police said Praveen Raja (19) and Ramji (20) had intercepted Ramakrishnan, riding a two-wheeler, last night posing as police personnel and later snatched his six-sovereign gold chain.
The victim who spotted a Police patrol soon after the incident informed them about the robbery following which the nearby checkpost was alerted and the duo arrested.
The two were produced before a court here which remanded them to judicial custody today.