 Passenger trains connect from Suvalki , Hrodno and Lithuania to Warsaw and the rest of the European passenger network . Passenger services are provided by two rail service providers , PKP Intercity that provides intercity passengers trains ( express , intercity , eurocity , hotel and TLK ) and Przewozy Regionalne that operates only regional passenger trains financed by the voivodeship . Passenger trains are mostly run using electrical multiple units ( on electrified lines ) or rail buses . 
