New Delhi, Sept. 6 -- A viral social media trend involving mobile phones being attached to the windows of moving Delhi Metro trains has caught the attention of authorities, prompting the Delhi Metro Rail Corporation (DMRC) to issue a warning to content creators.

The trend involves creators using mobile phones to record videos through Metro windows, often as part of choreographed or staged reels. As more such clips appeared online, DMRC issued an advisory on Instagram, making it clear that such filming is not permitted on Metro premises.

The corporation warned that creators caught recording these videos could face action.

In its statement, DMRC said it had noticed social media creators attaching their phones to Metro train windows while...