* FTSEurofirst 300 index ends down 1.1 pct
* Automakers, airlines pressured by rising crude prices
* Oil majors slip on production worries, OMV off 5.8 pct
By Harpreet Bhal
LONDON, Feb 23 (Reuters) - European shares extended losses to a third straight session on Wednesday, with concerns growing that higher crude prices could erode global growth as investors saw no quick end to the crisis in oil-rich Libya.
The pan-European FTSEurofirst 300 <
> index of top shares ended down 1.1 percent at 1,152.04 points, its lowest close in more than three weeks.Deepening political unrest in Libya pushed Brent crude futures <LCOJ1> above $110 a barrel, sparking worries a spread of violence to major oil-producing countries could result in persistently higher energy prices at the expense of fragile global growth.
"People are getting much more worried now because it's spreading and it's unstoppable," said Koen de Leus, strategist at KBC Securities Bolero in Brussels, referring to the unrest across the Middle East and north Africa in recent weeks.
"There are two things that you can do: you can either stick your head in the ground and hope it goes away or just cover yourself by closing some positions in the equity market and going into the oil market."
Austrian oil and gas group OMV <OMVV.VI> fell 5.8 percent after it warned of a temporary fall in Libyan production and said it could not exclude a complete shutdown. [
]Peers with operations in Libya, including ENI <ENI.MI>, Repsol <REP.MC> and BP <BP.L>, shed 0.3 to 0.8 percent.
Higher oil prices also hit stocks in the auto and airline sector, according to traders, with Porsche <PSHG_p.DE> down 5.8 percent while Air France-KLM <AIRF.PA> and Lufthansa <LHAG.DE> shed 1.4 and 1.9 percent.
"Key losers in the DAX <
> today are auto stocks, which traditionally come under pressure when the oil price is high," Markus Huber, senior trader at ETX capital, said.
VOLATILITY
The sell-off in equities coincided with the VDAX-NEW volatility index <.V1XI>, one of Europe's main barometers of investor anxiety, hitting a six-week high.
The higher the volatility index, based on sell and buy options on Frankfurt's top-30 stocks <0#.GDAXI>, the lower investors' appetite for risky assets such as stocks.
The FTSEurofirst 300 has lost 2.9 percent in three days as political tension in Libya escalates, with market reaction more pronounced than when unrest hit neighbouring Egypt.
By comparison, the index lost 2.1 percent in the two weeks between the start of protests in Cairo in late January and the announcement by Egyptian President Hosni Mubarak that he was stepping down.
"The protests in Tunisia and Egypt were fairly peaceful, but this (unrest in Libya) really shows how the situation can get out of hand," De Leus said.
"If the crisis spills over to Algeria or Saudi Arabia then we could see oil prices of $200 a barrel or more ... and that will have a huge influence on economic growth."
Strong earnings results, however, helped individual companies push higher, with tobacco firm Swedish Match <SWMA.ST> rising 5.6 percent after it posted higher fourth-quarter profits boosted by cigar sales in the United States.[
]French lender Natixis <CNAT.PA> rose 4.3 percent after its profits beat estimates, while Credit Agricole <CAGR.PA> added 1.3 percent ahead of results due on Thursday. [
](Additional reporting by Josie Cox; editing by David Hulmes)