September 1999
Moscow · Buynaksk · Volgodonsk
Series of apartment-building bombings; more than 300 dead.
The authorities attributed the bombings to Chechen militants and used them as the casus belli for the Second Chechen War. FSB officer Alexander Litvinenko and historian Yuri Felshtinsky later published an investigation pointing to FSB involvement; the charge has neither been proven nor refuted in court.
— Source: Litvinenko & Felshtinsky · Novaya Gazeta · The Moscow Times