Nor has he said much about aiding the Russian oil and nuclear industries.

This agglomeration produced more than 30% of Russian oil by 1916.

And for good reason: increasingly, being a traditional Russian oil company can be dangerous to one's corporate health.

Russian oil and gas companies are looking for new markets as production rises.

It's not enough to command high prices for Russian oil and gas.

And Western companies developing Russian oil need to share the responsibility.

"Naturally, we are now looking into developing" Russian oil and gas holdings.

The Government said the move was needed to capture revenues to pay for Russian oil.

Europe is seriously considering whether it can be dependent on Russian oil and gas.

But experts of Russian oil expect the arrest to have a chilling effect on foreign interest in the sector as a whole.