LONDON (AFP) - Oil prices hit a record high above 126 dollars on Friday, driven into uncharted territory by speculative interest amid concerns about tight global energy supplies, analysts said. New York's main oil futures contract, light sweet crude for June delivery, spiked as high as 126.20 dollars per barrel in London trading hours. London's Brent crude contract hit an all-time high of 125.90 dollars. Sucden analyst Michael Davies said there was "keen interest in the oil market by the (investment) funds, which are currently being attracted by oil's rapid price appreciation this year. "This probably explains the move higher over the last few days," he added. Prices have rocketed to fresh records every day this week on the back of unrest in key producer Nigeria and other ongoing supply worries. Oil has soared 25 percent since the start of 2008 and has doubled since the same stage last year when it stood at about 62 dollars. Oil broke through the psychological 100-dollar mark in January and has since jumped above 110 and 120 dollars in a market also powered by a weak dollar and solid demand from Asian powerhouse economies China and India. Prices continued higher on Thursday after the OPEC cartel insisted the market was well-supplied and driven by speculators, not underlying demand. OPEC Secretary General Abdalla Salem El-Badri said Thursday there was no shortage of crude, brushing aside US calls for higher output to dampen runaway prices. "There is clearly no shortage of oil in the market," El-Badri said in a statement. The 13-member Organisation of the Petroleum Exporting Countries (OPEC) produces about 40 percent of the world's oil, with current output at about 32 million barrels per day. El-Badri also maintained OPEC's stance that oil-market volatility has been driven by financial market developments and the increased flow of speculative funds into oil futures. "The turmoil in some global equity markets and the considerable depreciation in the US dollar have encouraged investors to seek better returns in commodities, particularly in the crude oil futures market. This has driven prices higher," he said. However, analyst Kevin Norrish at Barclays Capital argued that the recent strengthening of the dollar did not support El-Badri's argument. "Given that the US dollar has marginally strengthened against the euro over the past week, while (New York crude) prices have risen by 9.0 percent to reach all-time high prices, there appears to be little evidence to support his comment," Norrish said. The European single currency traded at 1.5441 dollars on Friday, far from the record high 1.6019 dollars that was struck on April 22. A weaker US unit tends to encourage demand for dollar-priced commodities because it encourages demand from foreign buyers. A stronger dollar, meanwhile, has the opposite effect.