NEW YORK -- Oil jumped $4 to record highs over $120 a barrel Monday on the weaker U.S. dollar and supply concerns from OPEC members Nigeria and Iran.
U.S. crude gained $3.52 to trade at $119.84 at 1330 EDT after surging to $120.36 earlier. London Brent crude rose $3.50 to $118.06 in light trade due to a bank holiday in Britain, after hitting $118.58 a barrel.
"People are piling back up on crude oil due to the weakness of the dollar and production issues in Nigeria," said Phil Flynn, analyst at Alaron Trading in Chicago. "But it also looks like momentum play after Friday's positive reaction to the unemployment report."
U.S. government data released Friday that showed U.S. payrolls fell by 20,000 jobs in March, a quarter of the losses expected, helping to counter concerns that the weaker U.S. economy could drag down oil demand.
The dollar fell broadly Monday, however, as forex investors decided the world's biggest economy was still struggling. A Monday report from the Institute for Supply Management that showed the U.S. service sector grew unexpectedly in April.
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Further support for oil came from Iran's announcement Monday it would not consider any incentives offered by world powers that would constrain its right to nuclear technology.
The comments come just three days after major powers said they would make a new offer to convince the Islamic republic to halt its nuclear plans, a process which the West believes Tehran wants to master so that it can build nuclear weapons.
Iran's standoff with the West over its nuclear program added geopolitical concerns and fundamental tightness last year that sent crude to new highs.
Crude has continued to surge since then, extending a six-year rally that has sent prices on a wave of investment by speculators seeking to hedge against inflation and the weak dollar.
President Bush, who has called upon oil cartel OPEC to increase output to help bring down prices, is expected to talk with officials from Saudi Arabia about the effects of high fuel prices on the U.S. economy on his trip to the world's top exporter later this month.
OPEC officials have rejected consumer nation's call to ramp up production and blame speculators for surging oil prices.
Additional supply worries came from Nigeria, where Royal Dutch Shell was forced to shut more of its production after militants Saturday attacked a flowstation in the oil-rich Niger Delta.
Renewed clashes between Turkey and Kurdish rebels in northern Iraq also lent support to oil prices.
The Turkish army said Saturday it killed more than 150 Kurdish PKK fighters in air strikes in northern Iraq last week, but the rebel group denied this and security forces in the region also expressed scepticism.
A Reuters poll of analysts forecast a weekly U.S. government report on inventories due out Wednesday will show a 1.8-million-barrel build in crude stocks, a 1.1-million-barrel increase in distillate inventories, and a 100,000-barrel fall in gasoline stocks.
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