A wave of bombings erupted in an eastern Ukrainian city, leaving nine people injured Friday, the country's Interior Ministry said.
The four explosions went off in Dnepropetrovsk over the course of 70 minutes.
The first blast went off in a trash can at a tram stop, injuring five people, the ministry said. The second followed 40 minutes later near a movie theater. That injured three.
Two other explosions occurred later, including one in the central part of the city. It was not clear where the ninth injury occurred.
Authorities began investigating as rescue workers treated the injured.
Interior Minister Vitaliy Zakharchenko and other government officials traveled to the city after the blasts occurred.
The city, with just over 1 million in population, is one of the largest in the country, the CIA World Factbook says.