At least three people were killed in clashes yesterday in Slovyansk , the Interior Ministry said security officials accused Russia of exploiting violence for reasons of invasion .
" Ukraine is a psychological factor for the oil market . Ukrainian position is very important in the short term . Market the oil has reached a higher level , and speculators and hedge funds hold a large number of long positions , " said a senior fund manager at Astmax Asset Management Inc. , Tetsu Emori , as quoted by Bloomberg , on Monday ( 04/21/2014 ) .
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Brent for June delivery fell 6 cents to USD109 , 47 per barrel on London 's ICE Futures Europe exchange . The volume of oil futures are trading down 39 percent from an average of 100 trading days .
While WTI for delivery in May , down 12 cents and was at USD104 , 18 per barrel , in electronic trading on the New York Mercantile Exchange . European benchmark crude closed at a premium of U.S. $ 6, 19 per barrel .