* Euro slumps to four-year low
* Oil down 20 percent since early May
* For a technical view, click: [
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(Recasts, adds details, previous dateline PERTH)
By David Sheppard
LONDON, June 7 (Reuters) - Oil fell by as much as 2.8 percent on Monday, with prices briefly dipping below $70 a barrel, as signs the U.S. economic recovery may be slowing and warnings about Hungary's debt clouded the outlook for energy demand.
U.S. crude for July <CLc1> tumbled as much as $2 to $69.51, the lowest since May 26, and was down 60 cents at $70.92 by 0856 GMT, extending Friday's drop of more than $3.
Prices have declined by around 20 percent from a 19-month high above $87 a barrel in early May.
ICE Brent crude for July <LCOc1> slid 21 cents to $71.88.
"We expect synchronized selling to continue in practically all the markets going into Monday's session, with the exception of the U.S. dollar and treasuries, which will revert to their role as safe havens," MF Global analyst Edward Meir said.
The euro fell to a four-year low as investors fled to the dollar, shedding riskier equities and commodities and sending stock markets in Asia and Europe lower as they tracked declines of more than 3 percent on Wall Street on Friday. [
]Markets have declined sharply since monthly U.S. jobs data disappointed on Friday, adding fewer jobs than expected while a large portion were temporary hirings for the U.S. Census.
Adding to investors fears were comments from ruling party officials in Hungary suggesting it could be heading for a Greece-style debt crisis.
The euro <EUR=>, which has turned into the barometer for investor risk appetite, fell below $1.19 to its lowest since 2006.
Hungary's government said talk of a possible debt crisis was "exaggerated" on Saturday, but fears have been rekindled that more European nations could reveal financial frailties. [
]"There are lingering concerns about the European fiscal problems and also of course the weak U.S. jobs numbers on Friday also added to the gloom," said Toby Hassall, chief commodities analyst at CWA Global Markets Pty Ltd in Sydney.
"In addition to that, the strengthening U.S. dollar is also adding pressure as well. It's a multitude of negative influences out there that are currently pressuring oil prices."
A stronger dollar renders oil imports more expensive for European buyers and for consumers in Asia where demand is surging. The U.S. dollar index <.DXY> rose more than 0.1 percent against a basket of currencies.
Still, the start of the Atlantic hurricane season this week -- which the top U.S. government weather agency has warned could be the most intense since 2005 -- should provide some support for energy prices. [
]Analysts said below $70 a barrel there was solid support at $68, which could see prices bounce from here.
"We suspect that improving U.S. demand and the advent of the hurricane season should prevent protracted declines below $68 support from taking hold," Meir at MF Global said.
(Additional reporting by Fayen Yong in Perth and Alejandro Barbajosa in Singapore; Editing by William Hardy)