Telfs-Buchen, Austria (CNN) President Barack Obama on Monday said he'd convinced European leaders to maintain economic sanctions on Russia, even as U.S. officials concede the measures have done little to curb aggression by separatists in Eastern Ukraine.

The extension of sanctions was a chief goal of the U.S. President at this week's G7 meeting in the Bavarian Alps, where leaders huddled in a castle high above Munich to discuss Russia, ISIS and other pressing global issues.

Obama said at a press conference at the conclusion of the summit that "Russia's actions in Ukraine "are hurting Russia and hurting the Russian people."

The sanctions regime steadily imposed by Western nations will continue until a ceasefire that Russia agreed to in March goes into full effect, Obama said.

That accord, which leaders hammered out in Belarus, has been repeatedly violated. Some of the fiercest fighting since the so-called Minsk Agreement came this week, with heavy artillery fire reported near Donetsk.

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