Russian forces have seized the city of Kreminna in eastern Ukraine and Ukrainian troops have withdrawn from the city, the regional governor said on Tuesday. Kreminna, a city of more than 18,000 people about 574 km (356 miles) southeast of the capital Kyiv, appears to be the first city captured in a new Russian offensive in eastern Ukraine. “Kreminna is under the control of the ‘Orcs’ (Russians). They have entered the city,” Serhiy Gaidai, the governor of the Luhansk region, told a briefing. “Our defenders had to withdraw. They have entrenched themselves in new positions and continue to fight t…