By Sara Sjolin LONDON (MarketWatch) -- Crude-oil futures continued to rise in electronic trade on Friday, as concerns over unrest in the Middle East intensified. Oil futures for October delivery CLV2 +1.22% rose $1.19, or 1.2%, to $99.50 a barrel in European trading hours, adding to a 1.3% gain from Thursday, when the U.S. Federal Reserve said it would launch a third round of quantitative easing. Violence in the Middle East and North Africa pushed oil prices higher, with concerns that this week's unrest will disrupt oil supply. On Thursday, protesters attempted to storm the grounds of the U.S. embassy in Yemen.

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