Uranium One Becomes Operator at Mkuju River Project in Tanzania

TORONTO, ON and JOHANNESBURG, South Africa, June 7, 2011 /CNW/ - Uranium One Inc. ("Uranium One") announced that its 51% shareholder, JSC Atomredmetzoloto, has today completed the acquisition of Mantra Resources Ltd. ("Mantra").  Uranium One also announced that it has now become operator of Mantra's Mkuju River Project in Tanzania pursuant to agreements entered into with ARMZ in connection with today's closing.

Operating Agreement

Uranium One will manage the development of the Mkuju River Project and other Mantra exploration activities pursuant to an operating agreement entered into on June 6, 2011 between Uranium One, ARMZ and Mantra.

Development of the Mkuju River Project is to be completed in accordance with a revised feasibility study scheduled for completion in Q1 2012 and work programs approved by Uranium One and ARMZ.

Loan Agreement

In accordance with a loan agreement between Uranium One and Mantra dated June 6, 2011, Uranium One has also agreed to provide a credit facility to fund the development of the Mkuju River Project and other Mantra exploration activities. The credit facility will be guaranteed by ARMZ.

Prior to completion of the revised feasibility study, work at Mkuju River will be funded from Mantra's existing cash balance and from cash flow from Uranium One's Kazakhstan operations.

Mkuju River Project

The Mkuju River Project is a large scale, uranium development project located in southern Tanzania.

As previously announced, Uranium One has a call option to acquire Mantra from ARMZ for consideration equal to ARMZ's cost plus certain additional expenditures, exercisable for a period of 12 months from today's closing.  ARMZ also has a put option to sell Mantra to Uranium One for the same consideration at the end of such 12 month period. The call option and the put option may be extended to 24 months if Uranium One partially exercises that option and acquires approximately 15% of Mantra for US $150 million before January 31, 2012.  The option to acquire the remaining 85% interest in Mantra (or 100% if the option is not partially exercised) is subject to Uranium One minority shareholder approval.

About Uranium One

Uranium One is one of the world's largest publicly traded uranium producers with a globally diversified portfolio of assets located in Kazakhstan, the United States and Australia.

Cautionary Statement

No stock exchange, securities commission or other regulatory authority has approved or disapproved the information contained herein.

Forward-looking statements: This press release contains certain forward-looking statements. Forward-looking statements include but are not limited to those with respect to the price of uranium, the estimation of mineral resources and reserves, the realization of mineral reserve estimates, the timing and amount of estimated future production, costs of production, capital expenditures, costs and timing of the development of new deposits, success of exploration activities, permitting time lines, currency fluctuations, requirements for additional capital, government regulation of mining operations, environmental risks, unanticipated reclamation expenses, title disputes or claims and limitations on insurance coverage and the timing and possible outcome of pending litigation. In certain cases, forward-looking statements can be identified by the use of words such as "plans", "expects" or "does not expect", "is expected", "budget", "scheduled", "estimates", "forecasts", "intends", "anticipates" or "does not anticipate", or "believes" or variations of such words and phrases, or state that certain actions, events or results "may", "could", "would", "might" or "will" be taken, occur or be achieved. Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Uranium One to be materially different from any future results, performance or achievements expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, the completion of the transactions described in this press release, the future steady state production and cash costs of Uranium One, the actual results of current exploration activities, conclusions of economic evaluations, changes in project parameters as plans continue to be refined, possible variations in grade and ore densities or recovery rates, failure of plant, equipment or processes to operate as anticipated, accidents, labour disputes or other risks of the mining industry, delays in obtaining government approvals or financing or in completion of development or construction activities, risks relating to the integration of acquisitions and the realization of synergies relating thereto, to international operations, to prices of uranium as well as those factors referred to in the section entitled "Risk Factors" in Uranium One's Annual Information Form for the year ended December 31, 2010 which is available on SEDAR at www.sedar.com. Although Uranium One has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that forward-looking statements will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements.

Accordingly, readers should not place undue reliance on forward-looking statements. Uranium One expressly disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except in accordance with applicable securities laws.

For further information about Uranium One, please visit www.uranium1.com.