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Irving, Texas • Exxon Mobil says it will stop drilling an exploratory well in Russia's Kara Sea in compliance with U.S. sanctions against Russia over Russia's involvement in the Ukraine.

Exxon planned to drill the well between August and October. The latest round of sanctions called for the removal of U.S. workers on projects in the Russian Arctic by Sept. 26.

Exxon says it has received a license from the U.S. Treasury Department to wind down operations, but it is unclear whether the license will allow Exxon to stop drilling on the schedule it had already laid out. Exxon could not be immediately reached for comment.