Brent prices increased by 56¢ to stand at $104 a barrel today over fears of supply disruption from Central Asian oil producer Kazakhstan.

A third day of protests were held in the capital of Kazakhstan’s western oil-producing region after 15 people were killed in riots.

But gains were capped by ongoing concerns over the eurozone debt crisis and fears of regional instability following the death of North Korea’s leader Kim Jong-il, reports Reuters.

US crude rose by 37¢ to $94.25 a barrel as fresh signs of economic growth appeared.

Meanwhile, sanction-hit Iran is struggling to maintain its production and Libyan output has been delayed by a month.

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