Global oil prices have surged at market open. by 19 percent after Saudi Arabia's main oil processing plants were attacked, cutting the country's production by more than half.
As markets opened Monday in Asia, the Singapore Exchange saw benchmark oil futures rise as much as 11 dollars and 73 cents a barrel to 71 dollars and 95 cents.
In Europe, Brent crude oil was trading at almost 68 dollars a barrel, a rise of more than 12 percent.
On the New York Mercantile Exchange, West Texas Intermediate, was up by as much as 16 percent to almost 64 dollars.