Nuclear whistleblower Mordechai Vanunu has been released from jail after serving a three month sentence.

The Israeli, 55, was first jailed in 1986 for disclosing confidential information about Israel’s nuclear operation to the British media.

He was released in 2004 but last year was arrested again for breaching the conditions of his parole. It was his second sentence for this.

Mr Vananu’s release had been conditional on him not travelling abroad, speaking to the media or having any contact with foreign nationals.

But in December 2009 Jerusalem police arrested the former Negev Nuclear Research Centre technician on suspicion of meeting foreigners, including a Norwegian woman with whom he claimed to be in a relationship.

Mr Vananu said after he left jail: "All this harassing me and arresting me again and again is Israel's problem, not my problem."