ODESSA, December 10. /TASS/. The explosion that occurred in an office building in central Odessa,southern Ukraine, overnight to Wednesday is considered a terrorist attack, as follows from a statement posted on the website of the Ukrainian Interior Ministry Odessa department.

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.