US benchmark West Texas Intermediate for June delivery fell three cents to USD 59.60 a barrel, while Brent for June eased 18 cents to USD 66.60. However, trading was quiet with most Asian markets closed for public holidays.
Yesterday WTI jumped USD 1.05 and Brent gained 94 cents.
Both contracts rose by about a fifth through April owing to several factors, including concerns about unrest in Yemen, the weakening dollar and fewer US rigs in operation to produce the black gold.
The latest jump came after Wednesday's US Department of Energy inventory report, which showed a 500,000 barrel drop in petroleum stocks to 61.7 million barrels at the key Cushing, Oklahoma trading hub.
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While the decline was modest, it marked the first drop since late November. Traders are taking the decline as a sign producers are cutting back at key US petroleum sites, such as the Bakken region in North Dakota, analysts said.
However, Ric Spooner, a chief strategist at CMC Markets in Sydney, told Bloomberg News: "The market appears to be happy enough with steady production levels and the reduction in inventory.