India, Aug. 19 -- Two Spanish nationals who briefly visited India in July have emerged as prime suspects in a case of illegal graffiti at Yamuna Bank metro station, Delhi Police have found. The probe has revealed that the men allegedly sneaked into the metro depot and defaced walls and a train with graffiti before leaving the country the next day.

A senior police officer said the incident came to light on the morning of July 24, when drawings - a few shapes like triangle, a large dot etc - were found on the boundary wall of the station and on a train parked inside the Yamuna Bank metro yard. An FIR was registered at the Yamuna Bank Metro Police Station under provisions of the DMRC Act and the Delhi Police Defacement of Property Act.

Dep...