The site of the blast is about 100 meters from the town hall in Cangas.
It destroyed a real estate office in the ground floor of a building and also caused damage to nearby buildings, the Interior Ministry office in the regional capital, A Coruna, said.
Bomb disposal experts from the police cordoned off the site as they searched for traces of the explosive.
Ukrainian bloggers draw a parallel between the events in East Timor and the Crimea. Any comparison has a right to exist, but a detailed analysis of the situation does not give a promising forecast to Ukraine
The Armed Forces of Ukraine are preparing a terrorist act in the Donbass. To commit the act, Ukraine will use radioactive waste