India, Oct. 24 -- The Delhi Police's Metro unit has registered a case against unidentified people after two posters targeting the government over various issues and questioning its performance were found pasted on a seat inside a train on the Delhi Metro's Airport Express Line on Tuesday evening, police officers aware of the matter said on Saturday.

The first information report (FIR) was registered at the IGI Airport police station under section 3 of the Delhi Prevention of Defacement of Property (DPDP) Act for defacement of property and section 62 of the Delhi Metro Railway (Operation and Maintenance) Act for demonstration upon metro railway, the officers said.

The two A4-sized black-and-white posters, which were pasted on a seat, carr...