Asian stock markets slid Monday after China reported an uptick in new cases of its virus outbreak and analysts warned optimism the disease is under control might be premature. Market benchmarks in Tokyo, Shanghai and Hong Kong retreated. Australia was unchanged. The Shanghai Composite Index declined 0.5% to 2,862.35 and Tokyo's Nikkei 225 shed 0.4% to 23,742.75. Hong Kong's Hang Seng lost 0.9% to 27,162.84, AP reported. In South Korea, the Kospi declined 0.8% to 2,195.50 while Sydney's S&P-ASX 200 was unchanged at 7,016.30. Markets in New Zealand and Southeast Asia also retreated. Benchmark U.S. crude lost 15 cents to $50.17 per barrel in electronic trading on the New York mercantile Exchange. The contract fell 63 cents on Friday to settle at $50.32. Brent crude, used to price international oils, gave up 7 cents to $54.40 per barrel in London. It slid 46 cents the previous session to close at $54.47 per barrel. The dollar gained to 109.80 yen from Friday's 109.87 yen. The euro was unchanged at $1.0954.