* Gold slips on weaker oil, dollar rally
* Platinum extends losses and hits 3-year low
* SPDR gold holdings drop 2 percent (Updates prices)
SINGAPORE, Oct 6 (Reuters) - Gold fell nearly $4 on Monday, moving towards a two-week low hit last week, as crude oil dropped on demand fears and the dollar jumped to a 13-month high against the euro, reducing bullion's safe-haven appeal.
Platinum extended losses and tumbled to its weakest in almost three years years on economic weakness and dismal car sales, especially in the United States. Silver tracked gold lower, while palladium firmed on bargain hunting.
Gold <XAU=> was trading at $830.90 an ounce, down $3.90 from New York's notional close on Friday, when it hit a two-week low of $818.70 after the U.S. House of Representatives voted to pass a $700 billion to bailout the U.S. financial system.
"If currencies such as euro and pound continue to move lower, and the dollar higher, then I guess we would see more downside pressure on gold," said Adrian Koh, analyst at Phillip Futures in Singapore.
"Apparently, the $820 levels will be the near-term support to look at. If we do move below those levels, we will probably be heading back to the 800 levels very soon," said Koh, referring to levels last seen in September.
Gold hit a two-month high of $920 an ounce in late September before gradually falling on a rebound in the U.S. dollar. The metal was below a record high of $1,030.80 struck in March.
Investors also booked profits, with holdings in the world's largest gold-backed ETF, the SPDR Gold Trust <GLD>, showing a drop to 739.95 tonnes as of Oct. 6 from 755.26 last week. <XAUEXT-NYS-TT>.
Oil <CLc1> fell 2 percent on Monday on fears efforts aimed at containing the spreading credit crisis would fail to stave off a deeper decline in oil demand. [
]The euro hit a 13-month low against the dollar as investors shifted their focus to banking problems in Europe and whether a similar plan would emerge there following U.S. approval of a key bailout package. [
]Platinum <XPT=> was trading at $942.00 an ounce, down $8 from New York's notional close, having hit a low of $932.50 an ounce, its weakest since November 2005.
"I think the outlook for platinum remains weak and the effects of the credit crisis is also going to weigh on platinum more than gold," said Koh of Phillip Futures.
"I don't have any nearby supports, and I have to look all the way back to the 2005 periods for indications. Probably around the $920, then $900 levels," he said.
Platinum prices have tumbled more than 50 percent since hitting a lifetime high of $2,290 in March, when speculators bought the metal on supply worries following a power crisis in main producer South Africa.
New York gold futures <GCZ8> added $1.3 an ounce to $834.5 an ounce on the COMEX division of the New York Mercantile Exchange. Precious metals prices at 0250 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 830.90 -3.90 -0.47 -0.22 Spot Silver 10.94 -0.15 -1.35 -25.93 Spot Platinum 942.00 -8.00 -0.84 -38.03 Spot Palladium 198.00 4.00 +2.06 -46.20 TOCOM Gold 2782.00 -56.00 -1.97 -9.08 17683 TOCOM Platinum 3127.00 -83.00 -2.59 -41.43 8123 TOCOM Silver 366.60 -12.50 -3.30 -32.24 407 TOCOM Palladium 679.00 -17.00 -2.44 -49.74 270 Euro/Dollar 1.3645 Dollar/Yen 104.33 TOCOM prices in yen per gram, except TOCOM silver which is priced in yen per 10 grams. Spot prices in $ per ounce. (Reporting by Lewa Pardomuan; Editing by Ben Tan)