Police have arrested a person on Wednesday in connection with the robbery at Rajender Nagar Metro station in Delhi.
Sources said the man arrested is a former Delhi Metro employee.
Two unidentified men had stabbed a metro staffer at the Rajendra Nagar metro station and stole Rs 12 lakh on Monday.
The process of recovering the money is underway, sources said.
MK Meena, joint commissioner of police of the New Delhi range will address a press conference at 3pm at the boat club regarding solving of the robbery case.
In the wake of the heist, Delhi Metro commuters have been ordered by the Central Industrial Security Force (CISF) to not cover their faces using surgical masks or mufflers or any cloth.
The two men who had attacked and stabbed the metro staffer and looted from the control room were seen wearing masks during their entry and exit at the station in the CCTV survelleince footage.