"What is definitely problematic is to include energy into the sanctions, because a rule must be observed that the sanctions must have a greater impact on Russia than on the countries imposing the sanctions."

Brent was up 73 cents, or 0.7%, at $100.22 a barrel, WTI gained 68 cents, or 0.7%, to $96.52.

Закупки валют недружественных стран, прежде всего долларов и евро, сейчас невозможны. В обозримом будущем картина не изменится. Для нас эти валюты токсичны: наши резервы заморожены, активы бизнеса арестованы, вводятся ограничения на расчеты.

Brent fell $1.29, or 1.2%, to $105.73 a barrel, WTI declined by $1.78, or 1.7%, to $103.01.

Russia's Gazprom on June 16 cut gas supplies via the Nord Stream pipeline to Germany to just 40% of capacity, citing maintenance issues with gas turbines at the key Portovaya compressor station.

Brent rose 35 cents, or 0.3%, to $105.00 a barrel, WTI gained 19 cents, or 0.2%, to $102.92.

Brent rose 16 cents, or 0.2%, to $100.85 a barrel, WTI climbed 18 cents, or 0.2%, to $98.71 a barrel.

The sanctions freeze assets of companies based in Iran, Vietnam, Singapore, the UAE and Hong Kong.

Brent rose as much as $3.08, or 2.9%, to $105.85 a barrel, WTI climbed to a session high of $102.14 a barrel.

China spent $18.9 billion on Russian oil, gas and coal in the three months to the end of May, almost double the amount a year earlier, latest customs data show. Meanwhile, India shelled out $5.1 billion in the same period, more than five times the value of a year ago.