Interim report for the quarter ended March 31, 2005

• Total revenue increased by 234% to MUSD 9.7 (MUSD 2.9)* • EBITDA amounted to MUSD 3.21 (MUSD 0.03) • The result before tax and minority interest improved to MUSD 2.3 (MUSD 0.1) • Earnings per share amounted to USD 0.00 (USD -0.00) • Oil production increased by 171% to 444,343 barrels • In April 2005 equity of MSEK 347.5 was raised through a preferential rights offering

*Comparisons reflect the quarter ended March 31, 2004 For further information: Maxim Barski, Managing Director, telephone +7-095 723 0718 Eric Forss, Chairman of the Board, telephone +46-8-613 00 85. This report has not been subject to review by the company’s auditors.

About Us

West Siberian Resources Ltd is an independent oil company active in the Tomsk region in Western Siberia. West Siberian’s depository receipts are traded on Nya Marknaden of the Stockholm Stock Exchange under the symbol WSIB.

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