The Tokyo District Court sentenced Japanese Red Army guerrilla group founder Fusako Shigenobu to 20 years in prison Thursday for plotting and aiding the 1974 occupation of the French Embassy in The Hague and for passport forgery.

Shigenobu, 60, was found guilty of conspiring with three Red Army members to storm the embassy and take the French ambassador and 10 other staff members hostage to secure the release of a Red Army member from a French prison.

Two police officers were shot and seriously wounded in the attack.