* Dollar softens after U.S. unemployment claims climb
* U.S. core CPI rises at fastest in over a year in January
* Tensions flare in Libya, Suez as MEast unrest spreads
(Updates prices, adds comment)
By Amanda Cooper and Jan Harvey
LONDON, Feb 17 (Reuters) - Gold extended gains to four-week highs on Thursday after data showed U.S. core consumer prices rose at their fastest in over a year in January and as a larger than expected rise in new unemployment claims hurt the dollar.
The metal also took support from haven buying on the back of ongoing unrest in the Middle East, which helped gold rise for a fourth day, its strongest run since September. [
]The metal is set for its strongest weekly performance since the start of the year as tensions flared, boosting other perceived safe-haven assets like the Swiss franc <CHF=>, which rose 0.3 percent on the day and U.S. Treasuries <US10YT=RR>.
Spot gold <XAU=> rose to a four-week high at $1,382.55 an ounce after the data and was bid at $1,380.20 an ounce at 1456 GMT, against $1,374.20 late in New York on Wednesday. U.S. gold futures for April delivery <GCJ1> rose $5.90 to $1,381.00.
The metal has erased some of the decline it posted in January, its worst-performing month since Dec. 2009, as investor confidence in the metal's underlying strength improved.
"The market is tending to be a little on the long side at these levels, because they are beginning to have faith," said ANZ Bank analyst Peter Hillyard.
"The mood of the market is that an inflation story, a war story, an Egypt story, a Bahrain story will all be bullish for gold, because the market is looking for those at the moment."
The prospect of rising inflation, not only in areas currently affected by the phenomenon like China and India, but also in the United States and Europe, has become an oft-cited reason to hold gold in recent weeks. [
]The dollar was a touch weaker versus the euro <EUR=> and a currency basket <.DXY> after the U.S. CPI data and a separate report showing new claims for unemployment benefits rose faster than expected last week.
Weakness in the U.S. unit tends to lift gold's appeal as an alternative asset and make dollar-priced commodities cheaper for holders of other currencies.
UNREST SPREADS
The metal is also taking support from haven demand as unrest spread across the Middle East after protests earlier in the year unseated leaders in Tunisia and Egypt.
"Upheavals in Libya and Iranian warship threats in the Suez Canal shifted market sentiment and pushed gold upward," said Barclays Capital in a note.
Iranian state TV said on Thursday two Iranian warships are due to pass through the strategic Suez Canal. A similar plan was announced on Wednesday but then cancelled. [
]Several hundred supporters of Libyan leader Muammar Gaddafi gathered in the capital to counteract online calls for an anti-government "day or rage" inspired by uprisings in Egypt and Tunisia. [
]The World Gold Council said overall demand for gold is likely to remain firm this year, driven by buying from India and China, as it released a report showing consumption of the precious metal rose to a ten-year high in 2010. [
]"We continue to see the two largest markets, China and India, driving the market," the WGC's investment research manager Eily Ong told Reuters.
"There have been rising income levels, still-high saving rates and we still think strong economic growth will continue to push up gold consumption."
Silver <XAG=> rose 0.9 percent to $30.90 an ounce, while palladium <XPD=> reversed earlier gains to fall 0.4 percent to $834.97 an ounce, and platinum <XPT=> rose 0.2 percent to $1,830.
(Reporting by Jan Harvey and Amanda Cooper)