CNQ Canadian Natural Resources Ltd

Alberta Employment and Immigration released on April 21, 2009 the results of its provincial investigation regarding the April 24, 2007 incident that occurred at Canadian Natural Resources Limited's Horizon Oil Sands site. Canadian Natural Resources Limited (TSX: CNQ) (NYSE: CNQ) has fully cooperated in the investigation.

For the duration of the Horizon Project we maintained a strong safety record on the construction site. We were deeply saddened by the tragic deaths of the two contract workers and the related injuries to the associated contract workers. Our heartfelt sympathies are again extended to their families, friends and co-workers.

As this incident is now in formal legal proceedings, no further comment will be issued by Canadian Natural Resources Limited until the matter has been fully resolved.

Certain information regarding the Company contained herein may constitute forward-looking statements under applicable securities laws. Such statements are subject to known or unknown risks and uncertainties that may cause actual results to differ materially from those anticipated or implied in the forward-looking statements.

Contacts: Canadian Natural Resources Limited Allan P. Markin Chairman (403) 514-7777 (403) 514-7888 (FAX) Canadian Natural Resources Limited John G. Langille Vice-Chairman (403) 514-7777 (403) 514-7888 (FAX) Canadian Natural Resources Limited Steve W. Laut President and Chief Operating Officer (403) 514-7777 (403) 514-7888 (FAX) Canadian Natural Resources Limited Douglas A. Proll Chief Financial Officer and Senior Vice-President, Finance (403) 514-7777 (403) 514-7888 (FAX) Canadian Natural Resources Limited Corey B. Bieber Vice-President, Finance & Investor Relations (403) 514-7777 (403) 514-7888 (FAX) Canadian Natural Resources Limited 2500, 855 - 2nd Street S.W. Calgary, Alberta T2P 4J8 Email: ir@cnrl.com Website: www.cnrl.com