* Oil falls more than $1, extends losses of previous session
* Market spooked by concerns of further demand erosion
* World stocks fall, await U.S. jobs data
(Updates prices, adds comment, Nigeria detail)
By Santosh Menon
LONDON, Aug 1 (Reuters) - Oil eased to near $123 a barrel on Friday, extending losses from a day earlier, as sluggish U.S. economic data pointed to further erosion of oil demand in the world's top energy consumer.
U.S. light crude for September delivery <CLc1> fell 92 cents to $123.16 a barrel by 1117 GMT, off lows of $122.10 and on top of a $2.69 fall in the previous session. London Brent crude <LCOc1> fell 91 cents to $123.07 a barrel.
Analysts said U.S. data released on Thursday, showing weaker-than-expected economic growth and a sizable increase in jobless claims amid high energy prices, had put the outlook for oil demand into sharper focus.
"There is no doubt in my mind that the global economy will deteriorate further into recession and oil demand will suffer accordingly," said Robert Laughlin of broker MF Global.
World stock markets fell on Friday, with attention focused on U.S. jobs data due later in the day. [
]Gerard Rigby of Fuel First Consulting in Sydney added: "High oil prices are taking their toll on western economies. Prices are now on a downward trend due to weaker U.S. economic data."
U.S. gasoline demand has been trailing last year's levels by about 1.5 percent as pump prices hit record highs and the economy soured, according to most recent government data, with demand growth also hit in Europe.
Oil has fallen from a record above $147 a barrel hit on July 11, the peak of a six-year rally set in motion by an Asian economic boom. Oil's 11.4 percent loss for the month of July marked the biggest monthly decline in percentage terms since December 2004.
Moody's Economy.com economist Matt Robinson said he expected crude oil prices to continue drifting lower, averaging around $110 a barrel in the fourth quarter.
The Reuters-Jefferies CRB Index <.CRB>, an index of 19 commodity futures with a bias towards energy products such as crude oil and natural gas, saw its biggest decline in 28 years in July. The index lost 10 percent during the month, the steepest drop since it fell 10.5 percent in March 1980.
But market concerns about OPEC member and the world's fourth biggest oil exporter Iran, which remains locked in a tense standoff with the West over its nuclear programme, and supply disruptions in Nigeria have offered some support to oil prices.
Iran has a weekend deadline to respond to an offer made by major powers to hold off imposing more sanctions in exchange for freezing any expansion of its nuclear work. [
]Nigeria's crude oil production fell by 150,000 barrels per day after Monday's militant attack on a major pipeline in the Niger Delta, an official with state-run oil company NNPC said on Friday.
This week's rebel attacks in Nigeria added to a string of bombings that has disrupted the OPEC nation's production. (Additional reporting by Felicia Loo in Singapore, Editing by Anthony Barker)