The Harper government is ratcheting up the pressuree on Russia with more sanctions against organizations in Russia – including a pro-Putin biker gang known as the Night Wolves.

Prime Minister Harper says there must be ongoing consequences for Russia's aggression in Crimea, annexed from Ukraine.

The latest sanctions also target four energy giants.

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Three Eurasian Youth Union leaders have also been hit with travel bans, joining a list that already includes the head of the Night Wolves.

The government has also imposed a ban on imports and exports from Crimea.

Harper says further steps were taken in co-ordination with international partners.

Last August, Russia announced a year-long ban on certain agricultural imports from countries, including Canada, that imposed sanctions.