NEW YORK, Sept. 18, 2008 (GLOBE NEWSWIRE) -- Roy Jacobs & Associates announces that tomorrow, September 19, 2008, is the deadline for filing for Lead Plaintiff status in the class actions on behalf of purchasers of the common units of SemGroup Energy Partners, L.P. (``SGLP'' or the ``Company'') (NasdaqGM:SGLP - News) during the period from February 20, 2008 through July 17, 2008 (the ``Class Period'') for violation of the federal securities laws.

For further information, please contact Roy L. Jacobs, Esq. toll-free at 1-888-884-4490 or by e-mail to rjacobs@jacobsclasslaw.com. You may also visit the firm's website at http://www.jacobsclasslaw.com, where you may sign up for Lead Plaintiff.

As a result of the alleged wrongdoing, purchasers of SGLP units during the Class Period have lost almost $300 million in unitholder value, and the value of the units has not recovered.

Time is short. If you purchased SGLP units during the period from February 20, 2008 through July 17, 2008, including units bought in the February 2008 offering, or in the open market and are interested in discussing your rights free of charge, please contact Roy L. Jacobs at once. Mr. Jacobs will be glad to personally speak with you. You may also sign up at the Firm's Website. You do not have to have sold your units to participate in the action or serve as Lead Plaintiff. All motions for appointment as Lead Plaintiff must be filed by September 19, 2008.

More information on this and other class actions can be found on the Class Action Newsline at http://www.globenewswire.com/ca.

          Roy Jacobs & Associates
          Roy L. Jacobs, Esq.
          1-888-884-4490
          rjacobs@jacobsclasslaw.com
          www.jacobsclasslaw.com