Fearing a major attack by Russian troops, the Ukrainian capital Kiev is extending its night curfew. According to Mayor Vitali Klitschko, it will apply from as early as 5 pm (1500 GMT) on Saturday until 8 am the next morning. Previously, it applied from 10 pm. In addition, the metro stopped operating, Klitschko wrote on the Telegram news channel. The metro stations are currently used by residents as shelters during air raids.