A miner is transported on a conveyor belt as he leaves coal mine Haljinici in Kakanj, Bosnia and Herzegovina October 13, 2015. Four miners were killed and two injured early on Tuesday when a platform holding up the roof caved in on them in a mine in central Bosnia. The accident occurred at around 1 a.m. at a depth of 105 meters as a group of 28 miners were installing electric equipment in the Kakanj coal mine, outside the digging area, mining inspector Ferid Osmanovic told a news conference. REUTERS/Dado Ruvic