Extradition proceedings against the other two men - Romania's Mihai Ionut Paunescu, 28, and 27-year-old Deniss Calovskis from Latvia - are now under way.
Costinel Mijloc, 24, of Highfield Road, Smethwick, was also imprisoned along with Stefanale Ruset, 19, of Kentish Road, Handsworth, and Ionut Cristian Toader, 24, of Selsey Road, Birmingham.