NEW : Man arrested at Cyprus airport after Interpol alert . The man was detained by police in the Larnaca Airport and is being questioned about his travel plans. Robert Christopher Metsos allegedly buried money in Virginia park . Russian Foreign Ministry says arrests are `` regrettable '' against background of renewed U.S.-Russia relations . Metsos , 55 , is free after paying 20,000 euros ( about $ 24,000 ) in cash as bail , but he is not allowed to leave the country , police said . Documents say suspects were involved in long-term missions in the U.S .
NEW : Man arrested at Cyprus airport after Interpol alert . The man was detained by police in the Larnaca Airport and is being questioned about his travel plans. 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 .