Russia said it will cut off gas exports to Ukraine. The price of natural gas was up by around 1%.
Meanwhile, oil prices were on the rise as militants extended their control in Iraq.
"Pictures of atrocities in Iraq, the breakdown of talks between Ukraine and [Russia's state-owned gas supplier] Gazprom, even scandal within the Polish central bank ... it all makes for a risk averse start to the week," said Kit Juckes, a strategist at Societe Generale.
2. Potential market movers -- Starbucks, Medtronic, Covidien:Starbucks(SBUX) shares were lower by roughly 2% in premarket trading. The company announced Sunday night that it will begin paying up to $30,000 per employee for college courses.