Israel has charged nuclear whistleblower Mordechai Vanunu with violating the terms of his release from prison.

Vanunu was freed from an Israeli jail last year after serving an 18-year sentence for revealing secrets of Israel's nuclear program to a British journalist in the 1980s.  

Under terms of his release, the former Israeli nuclear technician was barred from contacting foreigners or leaving the country.  He was re-arrested in November, after granting another interview in which he said Israel has up to 200 atomic warheads, a neutron bomb, and hydrogen bombs.

Israel has never admitted or denied having a nuclear arsenal. 

Reuters news agency reports a new indictment includes charges that Vanunu, a Christian convert, also violated release terms by trying to visit the West Bank in December to attend a midnight Christmas religious service.