Dafniya, Libya (CNN) -- Libyan rebels and troops loyal to Moammar Gadhafi shelled each other for hours on Saturday in clashes at the highly contested frontline of Dafniya, an embattled town just west of the besieged port city of Misrata. At least 11 rebels were wounded in the exchange of fire and treated at one of the two field hospitals in what has been the most active day in Dafniya this week, according to a CNN team. Heavy government shelling on Misrata and Dafniya began shortly after Gadhafi rallied his supporters in an audio message on state TV and threatened to take the fighting to Europe in retaliation for NATO's bombing campaign.
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NEW: The African Union calls for talks between rebels and the government
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A government spokesman reiterated Gadhafi's call for vengeance
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11 rebels wounded in exchange of fire at frontline
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The rebel-held city of Misrata and the embattled city of Dafniya were attacked Saturday
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