(ANSA) - SOFIA, JUL 29 - Bulgarian border police have completed the evacuation of all 186 passengers from the Swiss-flagged cruise ship Viking Ullur after it ran aground yesterday on the Danube in Bulgaria due to low water levels in the river caused by the drought. This was reported by the Bulgarian news agency BTA. The ship ran aground at river kilometer 817, opposite Gomotartsi and about 25 km upstream from Vidin, not far from the Serbian border. There were 186 passengers from EU countries and 52 crew members on board. The passengers ran out of food and drinking water after the ship—which was supposed to resupply in Vidin—was unable to reach the port. The ship's agent dispatched the French-flagged vessel Vivaldi to rescue them, but the Vivaldi was unable to get close enough, making it necessary for the Bulgarian border police to intervene. The transfer of passengers' luggage is still underway on Tuesday. The fate of the 52 crew members remains uncertain, as the Viking Ullur could remain adrift for an extended period depending on navigation conditions and the prospects for refloating, the Border Police said. Initial reports indicated that the adrift cruise ship was located near Salcia, in southwestern Romania. It had departed from the Romanian town of Drobeta-Turnu Severin on Monday evening, bound for Vidin. Several attempts to refloat the vessel, carried out between Monday evening and yesterday morning, failed. (ANSA).