LONDON (Dow Jones)--OeBB Infrastructur AG, Austria's government-guaranteed railway infrastructure agency, has hired Citigroup Inc., Erste Group, HSBC Holdings PLC and Morgan Stanley to run a planned euro-denominated benchmark bond, one of the banks said Monday. The issuer is rated Aaa by Moody's Investors Service Inc. and AAA by Standard & Poor's Corp. The transaction will be launched in the near future, subject to market conditions. -By Mark Brown, Dow Jones Newswires; + 44 (0)207 842 9485; [email protected] (END) Dow Jones Newswires June 21, 2010 03:55 ET (07:55 GMT)