NEW : Was arrested at Cyprus airport after an alert . NEW : John Christopher ##son allegedly buried money in Virginia park . Russian Foreign Ministry says arrests are ` ` regrettable '' against background of renewed diplomatic relations . Documents suggest suspects were involved in long - term missions in the U.S .
NEW : Man arrested at Cyprus airport after Interpol alert . NEW : Robert Christopher Metsos allegedly buried money in Virginia park . Russian Foreign Ministry says arrests are `` regrettable '' against background of renewed U.S.-Russia relations . Documents say suspects were involved in long-term missions in the U.S .