Via Reuters:

Western-led operations to enforce a no fly zone to stop a violent crackdown against a popular uprising won more Arab support when the United Arab Emirates said it would take part, but France cautioned the conflict would not be quick.
“I doubt that it will be days,” Admiral Edouard Guillaud told France Info radio. “I think it will be weeks. I hope it will not take months.”
Guillaud said a French plane destroyed an army artillery battery near the eastern frontline town of Ajdabiyah, 150 km (90 miles) south of Benghazi. Ajdabiyah is strategically important for both sides as it commands the coastal highway to the west.
In London, the Ministry of Defense said British Tornado aircraft had also been active there, firing missiles overnight at Libyan military vehicles threatening civilians.
In Brussels, a NATO official said on Friday planning for NATO’s no-fly operation assumed a mission lasting 90 days, but this could be extended or shortened as required.

This comes as rebel spokesman Mustafa Gheriani said he expected Ajdabiyah to fall either today or tomorrow following British and French air strikes.