The two Slovak men, aged 40 and 42, a 26-year-old national of Serbia and Montenegro and his 22-year-old pregnant wife with a small child met by previous arrangement at Zagreb's central railway station on Sunday.
After the Slovaks sold the couple two forged Slovak passports for 4,000 euros, they set out together for the Bregana border crossing between Croatia and Slovenia in a Skoda Fabia car bearing Slovak registration plates, where border police found the passports to be forged.
The Slovaks and the Serb man were taken to the Zagreb County Court Remand Centre on Monday on charges of document forgery and illegal transfer of persons across the border.
The woman was released on account of being in an advanced stage of pregnancy and having a small child from whom she could not separate. She was given 72 hours to leave Croatia via the Bajakovo border crossing towards Serbia and Montenegro.