According to Interfax, a soldier was killed and another wounded in the July 27 grenade-launcher attack in Nazran, the regional capital of Ingushetia.
The incident comes a day after Russia launched a security crackdown in Ingushetia to counter what Russian officials say is growing lawlessness there.
Ingushetia borders war-torn Chechnya.
(Interfax, ITAR-TASS)