Iphone stolen

I was travelling from a train between dortmund and kassel. Someone took my iphone out of my pocket while I was just going out for a smoke since the train was late and the driver said you can go out and we shall let you know when the train is leaving. Within 5 minutes I left the seat and came back at the same place. The train was fairly empty as it was early morning. I noticed my iphone was not there in my jacket pocket and opened my laptop to connect it with the train wifi and use find my. It started showing no location found. I checked everywhere on the train and even the platform. I have reported it to deutsche bahn and to the police station in kassel. They believe it has been stolen has well. I provided them with my imei number and everything. Anything else I can do in this situation?