Ignacy Hryniewiecki or Ignaty Grinevitsky (Russian: ??????? ???????????; c.?1856 — March 13, 1881) was a Polish member of the Russian conspirational revolutionary society Narodnaya Volya.
He gained notoriety for participating in the bombing attack to which Tsar Alexander II of Russia succumbed.
Hryniewiecki threw the bomb that fatally wounded the Tsar and himself.
Having outlived his victim by a few hours, he died on the same day.
Hryniewiecki and his accomplices believed that the assassination of Alexander II could provoke a political or social revolution to overthrow the tsarist autocracy.
Many historians consider the assassination as a Pyrrhic victory, since instead of ushering in a revolution, it strengthened the resolve of the state to crush the revolutionary movement, leading to its decline in the 1880s.
Hryniewiecki's role in the assassination has sometimes been cited as the earliest occurrence of suicide terrorism.