belgrade joint sting serbian croatian police detain 17 people suspect smuggle dozens migrants european union serbia interior ministry say wednesday serbia center migrant crisis 2015 2016 hundreds thousands people flee war poverty middle east asia journey balkans reach european union route effectively close last year steady trickle migrants arrive mainly turkey via neighbor bulgaria continue many migrants use smugglers reach eu statement interior ministry say group detain belgrade four northern towns comprise 12 serbians one afghan man police neighbor croatia detain four suspect say suspect criminal group facilitate illegal cross border transit ... total 82 migrants afghanistan iran iraq take 1,500 euros 1,800 per person say official data show 4,500 migrants strand government-operated camp serbia right activists say hundreds scatter capital belgrade towns along croatian border 0.8442 euros serbian croatian police detain 17 smuggle migrants eu