ODESSA, December 10. /TASS/. A strong explosion went off in an office building in central Odessa, Ukraine, TASS correspondent reported on Wednesday.

The explosion went off on the first floor of a five-storey office building in the Admiralsky Avenue. The sound of the explosion could be heard ten kilometers away.

The police and doctors, who came to the site, said nobody was injured as no people were inside the building.

In the building there's an office of a volunteer organization, which collects aid for Ukrainian military in the operation in the country’s eastern regions.