Source:
xinhuanetTRIPOLI, Feb. 22 (Xinhua) -- Libya's Interior Minister Abdel- Fattah Younes al-Abidi announced his defection and support for the "Feb. 17 revolution", Al-Jazeera TV reported Tuesday.
He also urged the Libyan army to join the people and their " legitimate demands".
Inspired by streets-born uprisings which swept Tunisia and Egypt and forced their leaders to step down, thousands of Libyans have started a string of protests against leader Muammar Gaddafi, in power for 42 years.
With more bodies found in the capital Tripoli, opposition groups and Al-Arabiya TV said more than 500 have been killed and around 1,400 people are still missing since the unrest began in the North African country.
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http://news.xinhuanet.com/english2010/world/2011-02/23/c_13744574.htm
Weak source, maybe, but was shown in video on Aljazeera (English)
In the video, he made very clear he is calling for the army to join the opposition.
Seems like a pretty big deal to me.