Oct 5 (Reuters) - Copper prices were on track for a fourth straight session of declines, pressured by rising inventories, but trading volumes were tepid as top consumer China is on holiday.

Three-month copper on the London Metal Exchange was down 0.2% to $7,935 per metric ton by 0603 GMT, aluminium declined 0.1% to $2,243.50, nickel shed 0.2% to 18,695, while zinc rose 0.1% to $2,495.

LME inventories rose to 168,425 tons, leaping 211% since mid-July.

"It's discount hunters but there was not enough volume... so price is still fragile and could break anytime," said a metals trader.

LME copper rose as much as 0.4% earlier in the session.

LME lead was almost flat at $2,118 a ton and tin rose 1% to $24,170.

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DATA/EVENTS (GMT)

0830 UK All-Sector PMI Sept

1230 US International Trade Aug

1230 US Initial Jobless Clm Weekly

(Reporting by Mai Nguyen in Hanoi; Editing by Sonia Cheema)