Russia has warned that US oil firms could lose business if the US discriminates against Russia in World Trade Organization talks.
"If you discriminate against us in the WTO, you can't expect us to welcome you with open arms," the Kremlin's spokesperson, Dmitry Peskov said, reported Dow Jones.
Earlier, Russia said the $20bn gas project Shtokman in the Arctic sea would be further delayed.
However Dmitry Peskov rejected the notion that Russia was drawing a direct connection between US firms' role in developing the Shtokman gas field and negotiations with the US regarding Russia's WTO entry.
The US firms which have expressed an interest in joining Russia's Gazprom to develop the 3.7 trillion cubic metre gas field are ConocoPhillips and Chevron.
