A member of the Japanese Red Army convicted of a 1986 mortar attack on the U.S. Embassy in Jakarta has been transferred to a U.S. immigration facility for deportation after spending nearly two decades in federal prison, U.S. authorities said Friday.

Tsutomu Shirosaki, 67, fired two mortar shells at the embassy on May 14, 1986. He was arrested in Nepal in 1996 and later found guilty of attempted murder and other charges in U.S. federal court.

Shirosaki was released Friday from the low-security federal prison in Yazoo City, Mississippi, said Public Information Officer Marica Arp. He was originally sentenced to 30 years but was released early for good behavior.