Neeraj BaliChandigarh, July 12 -- Security agencies have launched an investigation after graffiti carrying pro-Khalistan slogans was found on a train at Ferozepur Cantonment railway station ahead of Prime Minister Narendra Modi's proposed visit to Punjab later this week.

The development surfaced after the banned separatist outfit Sikhs for Justice (SFJ) circulated a video purportedly showing slogans painted on coaches of a Delhi-bound train.

The video, attributed to SFJ, showed slogans such as "Khalistan Zindabad" and "Modi Murdabad" written on the train. The authenticity of the footage has not been independently verified.

The video was released by Gurpatwant Singh Pannun, the US-based leader of the banned outfit, who used it to reiterat...