SARAJEVO (Bosnia and Herzegovina), May 12 (SeeNews) â Zeljeznice Republike Srpske [BANJ:ZERS-R-A], the railway operator of Bosnia's Serb Republic entity, said it turned to a net loss of 5.3 million marka ($2.9 million/2.7 million euro) in the first quarter of 2020, from a 10.4 million marka profit a year earlier.