By Carla Mozee, MarketWatch

LONDON (MarketWatch) -- Losses among mining stocks dragged the U.K.'s FTSE 100 index lower Thursday, putting the index on track for its second straight decline.

The FTSE 100 index fell 0.1% to 6,832.32, with Anglo American PLC shares becoming the sharpest decliners. They fell 3.4% after Morgan Stanley cut the miner to an underweight rating from equal weight.

Also among the FTSE's worst price performers, shares of miner Rio Tinto PLC (RIO) dropped 3% and BHP Billiton PLC (BHP) lost 2.1%. Morgan Stanley cut its price targets on Anglo American, Rio Tinto and BHP as it reduced its price assumptions for iron ore for 2014 through 2019, according to Dow Jones Newswires.

In the wake of the World Bank's lowered 2014 economic growth forecast, investors have "taken as a cue to sell FTSE mining stocks once again," and push the sector to three-month lows, said David Madden, market analyst at IG, in a note Thursday.

The World Bank on Wednesday cut its global economic growth projection to 2.8% for the year, from its 3.2% forecast in January, though it said growth in the U.S. and Europe will accelerate this year.

Also heading lower Thursday, shares of copper producer Antofagasta PLC gave up 1.6%.

Outside of the FTSE 100, Mulberry Group PLC shares rose 0.2% as the luxury-goods retailer said it will expand lower-priced offerings following the successful launch of less-expensive handbags. Mulberry's annual profit fell 46%, while sales dipped to 163.5 million pounds ($275.16 million).

On the broader economic front, U.K. prices for housing rose in May, but demand shows signs of slowing, according to figures from the Royal Institution of Chartered Surveyors.

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