World oil prices fell this evening at the end of a week of heavy losses on concerns over Europe's debt crisis, a stuttering US recovery and the strengthening dollar.
US crude fell 78 cents to $70.02 a barrel, while London's Brent crude dipped 12 cents to $71.72.
Oil dived on Thursday to near 10-month lows as stock markets slumped on euro zone debt crisis concerns and a surprise worsening in jobs data in the US, the world's biggest energy consumer.
Oil began the week in negative territory, falling to 2010 lows on fears about future demand and the strong dollar.
The European single currency staggered as low as $1.2144 on Wednesday as markets were shocked by Germany's unilateral move to impose restrictions on what it termed highly speculative trading practices.
A stronger US currency makes dollar-priced crude more expensive for buyers using weaker currencies, denting demand, which leads to lower oil prices.
