The head of Russia's main investigative agency says a Russian soldier suspected of killing a family in Armenia will stand trial in that country.

The soldier, who served with a Russian military base in Gyumri, is suspected of shooting six family members dead in the Armenian city last week and stabbing a six-month-old baby to death. He was captured and is held at the Russian base.

Alexander Bastrykin, chief of Russia's Investigative Committee told Armenian President Serge Sarkisian Tuesday that an open trial in Armenia reflects a shared "desire for justice." He didn't specify if the soldier would be tried by Armenian authorities or in a Russian military tribunal.

Bastrykin's visit followed rallies by thousands in Gyumri demanding that the soldier be handed over to Armenian authorities.