RT.com reports:

Fire is engulfing Moscow’s Federation Tower – a skyscraper under construction which is set to become Europe’s tallest building. About 300 square meters are ablaze; people have been evacuated from the building, in the city’s business center.

The top floor is nearly completely ablaze, with the fire smoothing out and then bursting again. The wind in lower floors is facilitating the fire’s expansion. The huge image boards on the skyscraper’s walls have caught fire and threaten neighboring buildings. The flames can be seen several miles away.