The Group-D Apprentice employees, in support of their various demands, began their indefinite agitation before the South East Central Railway (SECR) Zonal headquarters here from Monday. The demands include absorption of course complete Act Apprentice of SECR MIB Workshop Nagpur in SECR alike other Railways and workshops. The protesters were not allowed to enter the zonal headquarters and large number of security personnel were deployed at the dharna spot to deal with any situation.