* Brent near 2-1/2 year high on Mideast, N. Africa unrest
* Attention also focused on elections in Nigeria
* Chinese interest rates up 0.25 pct, fourth rise since Oct
* Coming Up: U.S. API petroleum stocks at 2030 GMT
(Updates prices, adds quote)
By Jessica Donati
LONDON, April 5 (Reuters) - Oil prices fell on Tuesday but held near 2-1/2 year highs, with Brent crude close to $121 a barrel, on unrest in oil exporting countries in the Middle East and Africa.
A Western air strike destroyed two of Muammar Gaddafi's military vehicles in the east Libyan oil town of Brega on Tuesday allowing rebels to edge forward, but diplomatic efforts to end the war remained stalled. [
]The stalemate fuelled fears of a prolonged loss of oil exports from Libya despite reports that a first cargo of crude oil is due to be loaded by rebels on Tuesday.
Brent crude for May <LCOc1> fell 42 cents to $120.64 a barrel at 1213 GMT, after closing at $121.06 a barrel on Monday, the highest settlement since Aug. 1, 2008.
U.S. crude <CLc1> was 47 cents lower at $108 a barrel after settling at $107.78 on Monday, the highest since Sept. 22, 2008.
"It's looking overbought and we might see a bit of a correction now, but now that Brent has broken above $120 it's hard to put a top on it," said Rob Montefusco, an oil trader at Sucden Financial.
<^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ FACTBOX on Libya's oil production: [
] More on Middle East unrest: [ ] Libya Graphics http://link.reuters.com/neg68r Interactive graphic http://link.reuters.com/puk87r^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>
The fourth Chinese interest rate increase since October briefly triggered a decline of around $1 a barrel in oil prices, but markets pared the bulk of losses on reports of further clashes in West Africa on Tuesday.
"The market doesn't seem that bothered about Chinese interests rates any more, which seems totally crazy to me," said David Morrison, a strategist at GFT.
TIGHT SUPPLY?
The perception of tight fundamentals has helped trigger price gains on relatively small output interruptions, which have been compounded by the erosion of spare capacity from top exporter Saudi Arabia, analysts said.
"Spare capacity is eroding and together with the geopolitical backdrop where Nigerian outages are very much on the cards with the upcoming elections, upward pressure on prices could well continue," said Amrita Sen, an analyst at Barclays Capital.
The kingdom has raised supply and introduced lighter grades of oil to help fill in for missing Libyan output, but traders question how much more room for output increases remains.
Worries about oil supply also focused on Nigeria after elections there were postponed by a week due to logistical problems, sparking fury among voters who were promised a break with a history of flawed and violent polls. [
]Nigerian militants have previously hit supplies of the country's oil, a sweet crude that has jumped to a premium as a result of the Libyan outages.
"We have already lost good grades in Libya, and now the elections in Nigeria are providing further potential upside," Sucden Financial oil trader Montefusco added.
However, production was restarting in Gabon, which produces a similar grade of oil, after energy worker strikes completely cut off the country's near 240,000 bpd of output.
Total <TOTF.PA> and Royal Dutch Shell <RDSa.L>, key producers in Gabon, both said they were working to restore normal production as soon as possible. [
]The discount of U.S. crude futures to Brent <CL-LCO1=R> widened to $12.64 at 1214 GMT, gaining close to $2 a barrel since the start of trade this week, but remained distant from a record $17.12 a barrel spread at the start of March.
Weekly industry and government petroleum inventory reports are forecast to show a 1.4 million build in U.S. crude inventories, a 1.9 million barrel decline in gasoline stockpiles and a 200,000 barrel drop in distillates, according to a Reuters poll of analysts. [
] (Additional reporting by Seng Li Peng and Simon Webb in Singapore; editing by Anthony Barker)