Although both countries claim the military exercises are simply for practice, some wonder if the old dispute is again flaring.
Yunus-Bek Yevkurov, the Kremlin-backed president of Ingushetia, is the fourth government official in the North Caucasus targeted this month.
Continued violence in the North Caucusus region could be fueled by anger over corruption, experts say.
Bickering and divisiveness among democrats within former Soviet states could lead to authoritarian, anti-Western rule.
Some 36,000 officers are expected to be cut this year and many Soviet-era 'phantom divisions' eliminated. But will the economic crisis undercut reforms?
Some Russians say a new Amnesty International assessment understates the dangers faced by those who dare to offer dissent.
The tentative agreement, which must be ratified by both nations' legislatures, creates a framework for bilateral cooperation.
The country is under the harsh, one-man rule of Ramzan Kadyrov, who wears a track suit, keeps a pet tiger, and urges men to take second wives.