Three persons involved in various crime cases were detained under the Goondas Act here on Thursday on the order of the Commissioner of Police K. Vanniaperumal. According to a press release, detainees were P. Murugesan (26), K. Ramesh (23) and B. Selvam (37). Murugesan was involved in theft and chain snatching cases in K.K. Nagar and Ponmalai areas, while Ramesh was involved in chain snatching cases in Thillai Nagar, Srirangam, E. Pudur and K.K. Nagar areas. Selvam, was wanted in extortion and robbery within Fort, Palakkarai and Gandhi Market police station limits, the release added.