SINGAPORE, Nov 17 (Reuters) - Oil prices extended declines on Thursday as concerns over geopolitical tensions eased, while rising numbers of COVID-19 cases in China added to demand worries in the world's largest crude importer. Brent crude futures fell by $1.04, or 1.1%, to $91.82 a barrel by 0430 GMT. On Wednesday Brent dropped by 1.1% and WTI 1.5% after Russian oil shipments via the Druzhba pipeline to Hungary restarted. "Crude oil fell after NATO cleared Russia's missile attack on Poland, while demand concerns (are) back to trader's focus amid ongoing China's COVID curbs and gloomy global economic outlooks," said Tina Teng, an analyst at CMC Markets. Sustained concerns about weak demand in China are also "keeping markets grounded," said Stephen Innes, managing partner at SPI Asset Management.

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