By Guy Faulconbridge and Lidia Kelly MOSCOW (Reuters) -Russian forces on Wednesday advanced further into Ukraine's northern region of Sumy, threatening the regional capital after taking more than 150 square km (58 sq miles) of the area in less than two weeks,

Russian forces are advancing in the northern Ukrainian region of Sumy, bringing the regional capital within range of their drones and artillery, according to Ukrainian officials and analysts.

Russian forces are intensifying operations in Ukraine's Sumy region, seizing control of four border settlements. Despite Ukrainian advances into Russi