People walk over snow covered pavement by Danube river on a cold winter day in Belgrade on Jan. 27, 2017. Another week of low temperatures is expected in Serbia with yellow warning for fog. (Xinhua/Predrag Milosavljevic)
A group of swans fly over ice-covered Danube river on a cold winter day in Belgrade, Serbia, on Jan. 27, 2017. Another week of low temperatures is expected in Serbia with yellow warning for fog. (Xinhua/Predrag Milosavljevic)
Two Hungarian ice-breaking ships are deployed to help Serbian fleet to provide safe waterway for supply boats on a ice covered Danube river in Belgrade, Serbia, on Jan. 27, 2017. Another week of low temperatures is expected in Serbia with yellow warning for fog. (Xinhua/Predrag Milosavljevic)
