Russia’s security service says a 29-year-old Uzbekistan citizen has been detained over the killing of senior general Igor Kirillov and his assistant in Moscow.

Lt Gen Igor Kirillov, head of the Nuclear, Biological, Chemical Defence Forces (NBC), was outside a residential block early on Tuesday when a device hidden in a scooter was detonated remotely.

Russian security services said the suspect was recruited by Ukrainian intelligence, according to state media agencies.

A Ukrainian source told the BBC on Tuesday that the killing was orchestrated by Ukraine’s security service.