European governments, jolted by the downing of a passenger plane over eastern Ukraine that killed nearly 300 people, are contemplating a major expansion of sanctions on Russia as early as next week.

European Union leaders decided in recent days to expand the penalties to a broad new category of people and companies. But the apparent shooting down of a plane carrying more than 200 EU citizens has intensified a desire to act quickly and forcefully, including sanctions against oligarchs with ties to the Kremlin.

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