they wanted to go to Arkhangelsk and got maybe lost.... an even more stupid explaination the USA could not find? ( this was a long distance train were tickets, as we all know, are being checked already before - boarding- by a conductor. and they for sure would have told the -diplomats- that THIS train will not get them to Arkhangelsk... and special when there are foreigners are on board, the conductor will come to the coupe and tell you when it is time to get off....)

https://www.yahoo.com/news/family-ou...210442980.html ( russian langauge)
https://www.yahoo.com/news/russia-st...122102382.html ( english langauge)

Military diplomats? first time i have heard such a term used....