LONDON (AFP) - Oil prices sank on Monday, extending heavy pre-weekend losses and mirroring slumping stock markets as traders eyed weak consumer confidence in the United States, the worlds biggest crude consumer. New Yorks main futures contract, light sweet crude for delivery in September, fell 1.88 dollars to 65.63 dollars a barrel. Brent North Sea crude for October delivery also shed 1.88 dollars to 69.56 dollars in late afternoon London trading. Prices nosedived before the weekend as a weak US consumer confidence reading dampened hopes for a recovery in oil demand in the worlds biggest economy. Crude prices have continued to come under pressure, tracking equity markets lower as market participants become wary about recovery after poor sentiment data Friday highlighted the fragility of any recovery, said Nimit Khamar, analyst at Sucden brokers. Global stock markets plunged Monday, despite news that Japan has emerged from recession, as investors further questioned the strength of a tentative worldwide economic recovery. Up to last week, oil prices had jumped by about a fifth over one month on increased hopes of economic recovery and soaring Chinese crude imports. However, energy consultancy CGES on Monday noted that Chinas oil imports were starting to flag after hitting a record 4.635 million barrels per day (mbpd) in July. CGES noted that the boom in Chinese commodity imports appears to have run out of steam ... with the rise in (oil) prices and a drying up of cheap loans. China is the worlds second biggest energy consumer after the United States. Also on Monday, traders kept one eye on stormy weather close to US energy installations, which may result in oil supply disruptions. The first hurricane of the Atlantic storm season, Bill, strengthened Monday as it churned toward the US mainland, while another sizeable storm, Claudette, lost punch at landfall, weather officials said. In July last year, oil prices hit record peaks above 147 dollars a barrel on worries about potential supply disruptions. The market then collapsed because of weak energy demand arising from the world financial crisis, striking 32 dollars in December.