An explosion ripped through the Admiralsky business center in Odesa, southern Ukraine, at around 00:40 Kyiv time on Thursday, the Ukrainian Interior Ministry said in a press release.

"Unknown persons detonated an explosive device planted near the door to the office leased by the Samopomich Political Party organization," it said.

The blast damaged the premises and blew out windows in nearby offices. No one was hurt in the incident.

In the past few months, Odesa has seen a series of terrorist attacks, with the last one happening on February 17. The organizers of these explosions have not yet been found.