The Rostock Bahnbetriebswerk (short Bw Rostock ), known since 1994 as the Rostock depot (short Bh Rostock ) with the internal abbreviation WR 1 , is operated by DB Regio AG and is used for the maintenance, repair and provision of locomotives and railcars operating in Mecklenburg -Vorpommern are deployed or are stationed in Rostock .