Nisr was born in Lebanon in 1968 to a Muslim father and a Jewish mother who converted to Islam after her marriage. In 1982, Nisr moved to Israel and obtained Israeli citizenship under the Law of Return. He lived in Holon, and was married with two daughters. His immediate family remained behind in Lebanon.
Nasr established ties with a Hezbollah agent through his brother in Lebanon. He was asked to supply maps of Tel Aviv marking electricity and gas installations, to extract intelligence from a top Israeli military officer, and to monitor the activities of Israeli armor near Ramallah.
He was arrested in 2002, tried and convicted of spying for Hezbollah, and sentenced to six years in prison in a plea bargain. During his imprisonment, he gave up his Israeli citizenship, hoping to be included in a prisoner exchange deal. His release in a prisoner exchange was a Hezbollah demand during the 2006 Lebanon War, which Israel refused. However, on 1 June 2008, he was released in exchange for the body parts of Israeli soldiers killed during the war. He was subsequently deported to Lebanon.
- "Israel Deports Lebanese-Born Jewish Man Who Spied for Hezbollah". Bloomberg L.P. 30 May 2008. Retrieved 1 June 2008.
- Singer, Roni (11 December 2002). "Israeli jailed for spying for Hezbollah; Canada bans group". Haaretz. Retrieved 30 September 2012.
- "J Who are the Mid-East prisoners?". BBC. 26 July 2006. Retrieved 6 October 2006.
- Israel verifying identities of bodies handed over by Hezbollah
- "Nisr's release raises hopes of freedom for more prisoners". Gulf News. 1 June 2008. Retrieved 30 September 2012.
- "Who are the Mid-East prisoners?". BBC News. 26 November 2009. Retrieved 30 September 2012.
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