* Silver turns lower, helps spark profit taking in oil
* U.S. oil turns lower after hits highest since Sept. 2008
* Coming up: API oil data at 4:30 p.m. EDT Tuesday (Recasts, updates prices and market activity, changes byline and moves dateline from previous LONDON)
By Robert Gibbons
NEW YORK, April 25 (Reuters) - Oil turned lower on Monday as a bout of profit-taking was sparked when silver reversed after a sharp rally and when there was no follow through after U.S. oil prices hit their highest since September 2008 in early trading.
"Silver's sell off spilled over to crude markets and traders took profits," said Dan Flynn, analyst at PFGBest Research in Chicago.
Continued unrest in the Middle East and OPEC member Nigeria highlighting potential threats to supply had helped boost oil early, along with concerns about inflation after the dollar index fell to its lowest since 2008 on Thursday.
The dollar index <.DXY> measuring the greenback against a basket of currencies also bounced and pushed positive after silver turned back.
Brent crude for June <LCOc1> fell $1.22 to $122.77 a barrel by 10:54 a.m. (1454 GMT), having reached $124.75 earlier.
U.S. crude <CLc1> for May fell $1.07 to $111.22, retreating from an earlier $113.48 peak, highest intraday price since September 2008.
Spot silver <XAG=> turned lower on Monday, wiping out sharp initial gains after a failure to rise above 1980 highs triggered heavy technical selling. [
]Investors returning from a long holiday weekend were also expected to show caution ahead of a U.S. Federal Reserve two-day policy meeting this week.
The Fed meeting will include a news conference on Wednesday, as investors look for clues about the direction of monetary policy as the Fed's bond buying program nears its end in June.
Even as supply threats from geopolitical flare ups in the Middle East and Nigeria lent prices support, concerns have increased about oil demand being eroded by high prices.
SUPPLY THREATS REMAIN
NATO forces flattened a building in Muammar Gaddafi's compound, while forces loyal to the Libyan leader have bombarded the western rebel stronghold of Misrata. [
] [ ]Troops and tanks stormed Deraa, Syria, residents said, seeking to crush resistance in the city where a month-long uprising first erupted against the rule of President Bashar al-Assad. [
]Yemeni security forces opened fire to block a thousands-strong protest amid uncertainty over a Gulf plan for President Ali Abdullah Saleh to step down within weeks. [
]In top African oil producer Nigeria more than 500 people were killed in post-election violence, a human rights group said. [
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For a 24-hour technical outlook on U.S. oil:
http://graphics.thomsonreuters.com/WT1/20112504084605.jpg
For a 24-hour technical outlook on Brent oil:
http://graphics.thomsonreuters.com/WT1/20112504090558.jpg
For stories on Libya & Middle East crisis: [
]For a TAKE-A-LOOK on Middle East, N Africa:[
]For an analysis on unrest in Yemen: [
] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>Despite Libya's civil war and potential threats to supply elsewhere, Gulf delegates told Reuters that while OPEC members with spare capacity are ready to pump above agreed limits if there is a need, the producer group is unlikely to formally change output targets at a meeting in June. [
] (Additional reporting by Gene Ramos in New York, Barbara Lewis in London and Florence Tan and Manash Goswami in Singapore; Editing by John Picinich)