* Gold extends gains, Japan, Arab World in focus
* Coming Up: U.S. ECRI weekly index; 1430 GMT (Updates prices, adds quotes)
By Lewa Pardomuan
SINGAPORE, March 18 (Reuters) - Gold rose more than half a percent on Friday after equities markets regained strength and crude oil firmed on rising tensions in the Middle East and North Africa, but Japan's nuclear crisis could cap gains.
Investors shifted their attention to Libya after the United Nations authorised military strikes to curb leader Muammar Gaddafi, while a deadly unrest in Bahrain could stir up interest in bullion which has lost more than 2 percent since striking a record.
In Japan, engineers raced to restore a power cable to a quake-ravaged nuclear power plant on Friday in the hope of restarting pumps needed to pour cold water on overheating fuel rods and avert a catastrophic release of radiation.
Spot gold added $7.30 o $1,409.70 an ounce by 0310 GMT. Bullion rallied to a record around $1,444 last week on high oil prices, fears about civil war in Libya, unrest in the Middle East and renewed worries about sovereign debt crisis in Europe.
"As Japan deals with the aftermath of the earthquake, investors could focus back on the Middle East. The situation in Bahrain is of great concern currently," said Ong Yi Ling, investment analyst at Phillip Futures in Singapore.
"I would still have a bullish bias for gold. Gold prices may continue to hold firm in the face of the uncertain economic conditions currently. Of course, if we do see a broad-based sell off of equities, gold could be depressed as investors may sell bullion to raise cash."
U.S. gold futures for April rose $6.8 an ounce to $1,411 an ounce.
The U.N. Security Council passed a resolution endorsing a no-fly zone to halt Libyan government troops now around 100 km (60 miles) from rebel bastion of Benghazi. It also authorised "all necessary measures" -- code for military action -- to protect civilians against Gaddafi's forces.
In Bahrain, the country's largest opposition group urged Saudi Arabia to withdraw its forces and called for a U.N. inquiry into a crackdown on mainly Shi'ite protesters that has angered Iran and raised tensions in the oil-exporting region.
The physical market was steady after purchases by investors in Japan following last week's devastating earthquake sent premiums for gold bars in Tokyo to $2 an ounce, their strongest since late 2008.
Premiums were also steady in Singapore and Hong Kong.
"I guess the situation in Libya is supporting the market but people are also squaring off positions ahead of the weekend. There's not much activity on the physical side at current price levels," said a dealer in Hong Kong.
"We did see some buying from mainland China yesterday, but I don't think it has anything to do with the situation in Japan."
Japanese shares jumped nearly 2 percent and the yen tumbled on Friday after the G7 agreed on joint intervention to curb the currency's strength, but a sustained stock rally may have to wait until the full impact of a devastating earthquake and nuclear reactor crisis becomes clearer.
Declines in equities had prompted speculators to sell bullion to cover losses earlier this week.
Japanese stocks suffered their worst two-day slide since the 1987 crash on Monday and Tuesday, following the devastating earthquake and tsunami that killed thousands and crippled a nuclear power plant about 240 km (150 miles) north of Tokyo.
ICE Brent crude rose more than a dollar on Friday on fears of further geopolitical tensions in the Middle East and North Africa after U.N. approved military strikes to curb Libyan leader Gaddafi. Precious metals prices 0310 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 1409.70 7.30 +0.52 -0.69 Spot Silver 34.71 0.53 +1.55 12.48 Spot Platinum 1707.24 9.75 +0.57 -3.41 Spot Palladium 717.97 13.47 +1.91 -10.20 TOCOM Gold 3710.00 149.00 +4.18 -0.51 62810 TOCOM Platinum 4512.00 246.00 +5.77 -3.92 20744 TOCOM Silver 91.00 4.50 +5.20 12.35 1879 TOCOM Palladium 1902.00 140.00 +7.95 -9.30 386 Euro/Dollar 1.4070 Dollar/Yen 81.63 TOCOM prices in yen per gram. Spot prices in $ per ounce. (Editing by Himani Sarkar)
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