Rabbi Moshe Greenberg, a religious educator who survived a brutal Gulag in Siberia and secretly taught Judaism under an oppressive Soviet regime, has died in Israel. He was 84.

The Hasidic Chabad Lubavitch movement in which Greenberg was a member says he died on Tuesday.

Chabad said on Thursday that Greenberg was born in Moldova. At the age of 14 he went to Uzbekistan to study Judaism at a secret seminary. The Soviets prohibited teaching Judaism.

He was caught trying to escape the Soviet Union at the end of World War II and was banished to a Siberian forced labor camp for seven years. Chabad says he kept and taught Jewish traditions in the Gulag, despite the danger.

In 1967, he moved to Israel.

He is survived by 17 children.