Hi. On the evening of the 30th of June, at Amsterdam Zuid station a guy followed me through the gate after I checked in. I was running as the tram was delayed and I tried catching my train. As he followed me up the escalator to platform 1&2 where he unclipped my Beats by Dr. Dre headphones from my bag. I heard the unclipping noise but thought they just came loose and that I'll get them assoon as I reach the platform. As I turned around to get them he placed them on the silver frame which separates the two escalators. I thought he was a passenger running with me for the train. Out of confusion I grab them and got on the almost departing train, instead of getting on the train he just took the escalator down again. Probably looking for a new victim. Whould it be of any help to find his face on the security tapes? Regards.