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Israel believes that Hizbollah has amassed an arsenal of about 40,000 missiles and accuses Iran of supplying the weapons. In the event of war, Israeli officials have pledged to launch an even more intense version of their assault on Lebanon in 2006 which claimed over 1,200 lives.
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PLFP-GC has pointedly refused to deny carrying out the attack. Observers agree that Palestinian groups are more likely to be behind the attacks than Hizbollah. Amal Saad Ghoreyeb, a commentator in Lebanon's capital, Beirut, and the author of a book on Hizbollah, said that the Shia group saw no need to intervene in the Gaza conflict.
"Hizbollah is optimistic about Hamas's performance," she said. "Hamas has been trained by Hizbollah and Iran, but they jealously guard their autonomy. If Hizbollah were to step in for Hamas, what would that say about them?"
An election is approaching in Lebanon and domestic politics helps explain why Hizbollah may choose to stay out. "Hizbollah and its allies have a good chance of winning the elections in June," said Ms Ghoreyeb. "That would be a strategic blow to Israel and the US. Why would they want to jeopardise that position?"
http://www.telegraph.co.uk/news/worldnews/middleeast/israel/4175731/Israel-hits-back-after-Lebanese-rocket-strike-raises-tension.html