Canadian Pacific Railway Ltd said on Monday that it had ended talks to buy No. 3 U.S. railroad operator CSX Corp. The Wall Street Journal reported last week that Canadian Pacific had approached CSX about merging the two North American railroad operators, but that the offer had been rebuffed. Canadian Pacific said in a statement on Monday that there were no further talks planned regarding the merger. Officials at CSX were not immediately available for comment. (Reporting by Sneha Banerjee and Rohit T.K. in Bangalore; Editing by Simon Jennings)