Public holidays in China and the United States curbed trading volumes, while disappointing economic growth data from Japan also raised concerns about a cooling in demand.
April futures for Brent crude fell by 0.2% to $67.65 per barrel.
The United States and Iran are set to hold a second round of talks on Tehran"s nuclear ambitions in Switzerland this week, after resuming negotiations in early February. However, the renewed dialogue coincided with the deployment of a second US aircraft carrier to the Middle East, seen as preparation for a prolonged military campaign against Tehran should the talks fail.
US President Donald Trump has also repeatedly warned Tehran to accept a deal or face further military action.
AzVision.az
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