An unknown group attacked the Russian embassy in Minsk today hours before President Vladimir Putin was due there for a regional summit, Interfax reported.
The report cited eye-witnesses as saying that two people had tossed a grenade over a stone fence surrounding the Russian embassy early today.
No one was reported injured in the attack, but the blast left a crater some 17 centimeters (seven inches) wide in front of the building.
Belarus President Alexander Lukashenko immediately called an emergency government meeting to coordinate a police response to the attack, Interfax said.
Mr Putin is due in Minsk later today to attend a summit of the Commonwealth of Independent States (CIS) that groups the 12 former Soviet republics, excluding the three Baltic states.
AFP