News Releases

May 20, 2008

Shares Outstanding:  13,928,084

TSX: “ISR”                                                                                         

DRILLING UNDERWAY ON THE SUKKUR BLOCK, PAKISTAN

International Sovereign Energy Corp. (the “Company”) is pleased to report that drilling is underway on the 2,435.4 Sq. Km Sukkur Block, Sindh province, Pakistan in which the Company has an assigned 15% direct Working Interest (W.I.).  The Sukkur Block is located within a core Pakistan gas producing basin.  Mari Gas Company Limited (MGCL), the second largest gas production company in Pakistan, is the Sukkur Block project operator.

After extensive seismic review and interpretation of various prospects within the Block, two separate high priority gas structures were selected for drilling on a back-to-back basis starting with prospect ‘A’ followed by prospect ‘B’.  The reservoir target for both prospects is the (Eocene) Sui Main Limestone (depth approximately 1,200 m) which is the primary producing gas reservoir in the area.  Numerous large producing gas fields with multiple reservoirs surround the concession.  Prospect ‘A’ covers a 5 Sq. Km area and prospect ‘B’ covers a 4.1 Sq. Km area.  The projected recoverable reserve estimates, as calculated by MGCL through Monte Carlo Simulation, exceed 40 bcf for each prospect.  The estimated time to drill each well is 30 days (+/-).  Both prospects are within 5 Km from a main gas pipeline so that a discovery can be brought on stream on a fast track basis.  Drilling results will be released upon availability.

International Sovereign Energy Corp. is an oil and gas exploration development and production company with offices in Vancouver, British Columbia, Calgary, Alberta and Islamabad, Pakistan and is active in the exploration and development of hydrocarbon reserves in Western Canada and internationally.

For further information, please contact:

Omair Choudhry

Chief Financial Officer

Tel:                       (604) 684-7372

Fax:                       (604) 684-2407

Or visit our website at www.isove.com

The Toronto Stock Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. Certain information provided in this press release contains forward-looking statements that by their nature are subject to numerous risks and uncertainties and readers are cautioned that actual results may vary considerably from those forecasted.

Forward-looking statements:  This news release contains certain forward-looking statements, including management’s assessment of future plans and operations, and capital expenditures and the timing thereof, that involve substantial known and unknown risks and uncertainties, certain of which are beyond the Company’s control.  The Company’s actual results, performance or achievements could differ materially from those expressed in, or implied by, these forward-looking statements and, accordingly, no assurance can be given that any of these events anticipated by the forward-looking statements will transpire or occur, or if any of them do so, what benefits, including the amount of proceeds, that the Company will derive there from.  Additional information on the Company’s operations and financial results are included in reports on file with Canadian securities regulatory authorities and may be accessed through the SEDAR website (www.sedar.com).  All subsequent forward-looking statements, whether written or oral, attributable to the Company or persons acting on its behalf are expressly qualified in their entirety by these cautionary statements.  Furthermore, the forward-looking statements contained in this news release are made as at the date of this news release and the Company does not undertake any obligation to update publicly or to revise any of the included forward-looking statements, whether as a result of new information, future events or otherwise, except as may be required by applicable securities laws.