Russia said on Wednesday it would ban all food imports from the United States, and all fruit and vegetables from Europe.
Russian President Vladimir Putin has infuriated popular bloggers by forcing them to register with the state, but the effect has been to limit unflattering news.
Under the decree, the Russian government will generate a list of all products to be restricted or banned from entering the country.
At least six have died in weekend fighting.
A U.S.-backed cease-fire in Gaza broke down about 90 minutes after it became effective Friday.
Russia's latest media crackdown makes Putin critics online provide their home addresses.
The Texas oil giant says its offshore Arctic drilling rigs are set to start producing late this year.
Russia announced a ban on most fruit and vegetable imports from Poland and said it could extend it to the entire European Union.
Europe's broader strategy for reducing EU dependence on Russian natural gas would provide medium-term fixes, not an immediate backup plan.
Pro-Russian rebels have consistently kept investigators from reaching flight MH17 crash site.
New European sanctions on Russia could cause the Kremlin to retaliate and cut off natural gas to Europe, according to analysts.
With new penalties targeting key sectors, Moscow's projected growth is estimated to be "near zero."
The embargo is one of a slate of economic sanctions on Russia by the European Union and United States announced this week.
BP said that to date, sanctions had not had a significant effect on its business in Russia.
President Barack Obama spoke with several leaders in the European Union to discuss fresh sanctions against Russia.
The U.S. is seeking high-level talks to preserve a treaty banning medium-range missiles.
Russia's Navy is rehearsing for its annual Navy Day in Crimea, sans its former partner Ukraine.
New photos have emerged from the MH17 crash site that show an empty field of wreckage — deserted by monitors and pro-Russia separatists.
European ambassadors announce punitive new sanctions against Russia for its role in the MH17 disaster. Here's why Moscow has staying power.
Ukrainians living in the Netherlands staged a protest outside Maria Putin's apartment in Voorschoten.
All Internet firms hosting Russian data must have a data center in Russia, a blow to Silicon Valley.
U.S. officials said evidence suggests MH17 was downed by pro-Russian separatists, and that Putin's attempt to blame Ukraine was "not plausible."