At least two people have died in an office building fire near Moscow, the regional governor has said.
Up to seven more could still be trapped inside the burning building in Fryazino, about 25km (15.5miles) north-east of the capital, Andrey Vorobyov posted on social media.
Footage online shows thick smoke billowing from the upper floors of the eight-storey complex. In some videos, people can been seen at the windows.
The building once homed the Platan Research Institute and defence industry, according to state-owned news agency Tass.
However a statement to the agency from Ruselectronics, a Russia-owned electronics organisation, said the buiding has been privately owned since the 1990s.
Mr Vorobyov said eight emergency teams were working to rescue those still trapped in the building.
He added that a 34-year-old man had been taken to hospital in a serious condition, while two firefighters were also being treated for injuries sustained in the blaze.
Emergency ministry officials said over 100 specialists and two helicopters were working to fight the fire.
This is a developing story. Check back here for updates.
