A fire in an apartment building in northwestern China's Xinjiang region killed 10 people and injured nine, authorities said Friday, amid stringent lockdowns that have left many residents in the area stuck in their homes for more than three months. The fire broke out Thursday night in the regional capital of Urumqi, where temperatures have dropped below freezing after dark. Flames spread upward from the 15th floor to the 17th floor, with smoke billowing up to the 21st floor, according to multiple state media reports. The blaze took around three hours to extinguish. The deaths and injuries were caused by…