Northern Tier Energy Reports Operational Issue with Crude Unit

        Northern Tier Energy Reports Operational Issue with Crude Unit

PR Newswire

RIDGEFIELD, Conn., Sept. 22, 2013

RIDGEFIELD, Conn., Sept. 22, 2013 /PRNewswire/ --Northern Tier Energy LP
(NYSE: NTI), a Delaware limited partnership ("Northern Tier Energy" or the
"Partnership"). Ridgefield, CT. 

Today at approximately 11:30 am Central Time, our St. Paul Park, MN refinery
experienced a fire in one of its crude units that originated at a reduced
crude pump. The fire was brought under control and completely extinguished by
2:16 pmCentral Time by the refinery's Emergency Response Team and the St.
Paul Park and Newport Fire Departments. The refinery has begun to investigate
the cause of the fire and is assessing the damage. The Company anticipates
providing an update after more information has been gathered.

All personnel have been accounted for and no injuries have been reported. The
refinery has notified all applicable federal, state, city and county agencies.

About Northern Tier Energy
Northern Tier Energy LP is an independent downstream energy company
headquartered in Ridgefield, CT with refining, retail, and pipeline operations
serving the PADD II region of the United States. Northern Tier Energy was
established to own and operate the St. Paul Park Refinery as well as a retail
network of SuperAmerica brand convenience stores and a 17% equity interest in
the Minnesota Pipe Line.

SOURCE Northern Tier Energy

Contact: For assistance with media inquiries, please contact Christine
Carnicelli at our principal offices; Principal Offices, 38C Grove Street,
Suite 100, Ridgefield, CT 06877, p. (203) 244-6550,; For Investor Information, Contact: Alpha IR
Group, Phone: (203) 244-6544, Email:
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