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.
Militant Islamists have the moderate government surrounded in Mogadishu. If they took over, it would be a devastating blow to US counter-terrorism and anti-piracy efforts in East Africa.
Some Russians say a new Amnesty International assessment understates the dangers faced by those who dare to offer dissent.
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.
Definitional nuance will strengthen world response to terrorism.
Some advocate inviting Russia to join. Russian President Medvedev wants a new security architecture that includes his country.
Human rights advocates charge that the trial was shoddy and followed a weak investigation.
Fearful that US failure there could unleash the Taliban and other Islamist insurgencies, Russia may help NATO open a supply line through former Soviet territory.