Evidence "strongly suggests" Syria's government used chlorine gas on three towns in mid-April in violation of the chemical weapons treaty it joined last year, Human Rights Watch said.
Russia's energy giant Gazprom warned on Tuesday that new Western sanctions aimed at punishing the Kremlin for its perceived attempts to destabilise Ukraine could both hurt its stock price and leave Europe without crucial gas supplies.
Iran's crude oil exports have hit 1.2 million barrels per day, almost doubling from eight months ago when the country elected a new president, a top government official said.
US oil giant Chevron and state-controlled YPF unveiled plans Thursday to spend another $1.6 billion to develop Argentina's Vaca Muerta shale formation for oil and gas projects.
The construction would require investments of over $1 billion. According to the Ministry of Economic Affairs and Budget Planning, the draft project was deemed as excessively expensive: Oil Minister Uzakbai Karabalin.
Chairman of Russia's Gazprom Alexei Miller on Saturday said that Ukraine must pay back the full discount it has been granted on Russian gas over the past four years, worth $11.4 billion.