Brent crude rose near to a six-day high as concern that the crisis in Ukraine may disrupt Europe’s energy supplies countered increased signs of a slowing economy in China. West Texas Intermediate also gained in New York. Futures advanced for a second day in London after rising on May 2 as Ukraine sent armored vehicles and artillery to retake the town of Slovyansk, a stronghold for pro-separatist forces. A final reading of the China Purchasing Managers’ Index from HSBC Holdings Plc and Markit Economics was 48.1 for April, a fourth monthly contraction that missed the median estimate of 48.4 in a Bloomberg News survey of economists. “The most important factor is the Ukraine crisis, and that’s pushing up prices,” Gerrit Zambo, an oil trader at Bayerische Landesbank in Munich, said by phone today. “The weak Chinese data is more on the bearish side, and we’d be much lower if it weren’t for Ukraine.”