<p>The price of WTI crude, the main US oil contract, jumped more than five percent on Thursday on supply concerns due to a possible blockage of Kazakhstan's exports.</p>.<p>At 1359 GMT, WTI was up 5.7 per cent $103.63, while the main international contract Brent North Sea was 4.7 per cent higher at $105.39.</p>
<p>The price of WTI crude, the main US oil contract, jumped more than five percent on Thursday on supply concerns due to a possible blockage of Kazakhstan's exports.</p>.<p>At 1359 GMT, WTI was up 5.7 per cent $103.63, while the main international contract Brent North Sea was 4.7 per cent higher at $105.39.</p>