MOSCOW -- Russian authorities had detained a man suspected of planting a car bomb that killed a senior Russian army official, Russia's Federal Security Service (FSB) said Saturday.

The suspect, allegedly an agent of the Ukrainian special services, holds a Ukrainian residence permit, the FSB said in a statement.

Russian Lieutenant General Yaroslav Moskalik, deputy chief of the General Staff's main operations directorate, was killed Friday in a car explosion in Balashikha, a Moscow suburb, according to the Russian Investigative Committee.