Authorities in Ukraine and Russia have accused each other of orchestrating deadly bombings over the past week.
Dnipro regional police on December 14 arrested a suspect in connection with an explosion that occurred in the city center earlier that day.
The blast killed a man and injured four others, including two police officers, who remain hospitalized in critical condition.
According to authorities, the suspect, a 37-year-old local resident, allegedly acted under orders from the Russian intelligence service.
The suspect was arrested within hours following a joint operation by the police and Ukraine's Security Service (SBU). The SBU has classified the incident as a terrorist attack.
Meanwhile, Russia's Federal Security Service (FSB) on December 15 announced the arrest of a suspect in a car bombing in Russian-occupied Donetsk that reportedly killed a former prison warden and injured his wife on December 9. Russian state media say the suspect is a local resident.
The FSB alleges the suspect planted a homemade explosive device under the vehicle and detonated it remotely, acting on orders from Ukraine's Defense Intelligence Directorate.
Russian authorities have not disclosed the identity of the man killed in the explosion, describing him only as an officer.
Social media reports, however, have identified him as Sergei Yevsyukov, a former head of a prison where dozens of Ukrainian soldiers captured by Russian forces were killed in 2022.
No one has claimed responsibility for either explosion.
