Police in the southern Ukrainian port city of Odesa are investigating an explosion at a military aid center as a terrorist act.
Local authorities say the blast late on January 4 caused no injuries but shattered windows and damaged cars outside a building housing a volunteer center providing aid to Ukrainian troops fighting pro-Russian separatists in the east of the country.
Interfax quoted a city police spokesman as saying assailants used an explosive device to destroy the entrance door to the one-story building.
The blast is the latest in a series to hit military support centers in Odesa.
It also comes one day after an explosion targeted freight cars carrying petroleum products at the Odesa-Peresyp railway station.
No one has claimed responsibility for the attacks, which have prompted Kyiv to dispatch a National Guard unit to the city to participate in joint antiterrorism drills.