The ministry said Wednesday that its border patrol heard a shot Tuesday night and then discovered six migrants, of whom one had a chest wound. The ministry says a hunter who was at the scene was detained on suspicion that he shot the migrant. Since the so-called Balkan migrant route was closed in March after more than 1 million used it to head for the EU last year, hundreds fleeing wars and poverty are still crossing daily from Bulgaria through Serbia to try to make it into EU-member Hungary.