Schema-Archimandrite Isaac, in the world Ivan Nikolayevich Bobrikov, was born in 1865 in the village of Ostrov, Orel province, to a peasant family. In 1884 he entered Optina monastery as a novice. He was the last abbot of Optina monastery, and was distinguished by his great calm, simplicity and by the abundance of tears he shed during Divine services. When Optina monastery was closed in 1923, several of the monks led by Fr. Isaac remained in Kozelsk, where he served in the St. George church. Together with them were the blind, the halt and the hunchbacked.

In August, 1929, on the second or third day after the Transfiguration, all the Optina hieromonks, headed by Fr. Isaac, were arrested and imprisoned in Kozelsk prison. The arrested were sent to Sukhinichi prison, and from there to Smolensk.

In January, 1930, after the end of the "investigation", Fr. Isaac, was exiled to Siberia along with others of the Optina monks, where, according to one source, they ended their lives.

According to another source, Fr. Isaac was exiled to Belev in Moscow province. In 1932 he was arrested in Belev, but was released. On December 16, 1937, Archimandrite Isaac was arrested in Belev. On December 30 he was condemned to be shot by a "Troika" of the NKVD in Tula, and on January 8, 1938, he was shot together with other Optina monks in Tesnitsky wood near Tula.

Source:

http://www.pravoslavie.ru/english/49439.htm