A view of buildings damaged by what activists say was shelling by forces loyal to President Bashar al-Assad in the Khalidiya neighbourhood of Homs on Friday
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Syria conflict: Assad forces strike Homs

Syrian war planes and ground forces have struck at rebel-held districts of the city of Homs, say activists.

Aircraft, tanks and mortar units attacked districts including Khalidiya and Jouret al-Shiya, they said.

Saturday was "one of the most violent days that Homs has witnessed since the beginning of the revolution," an activist told AP news agency.

Footage uploaded to the internet purportedly shows shells landing in Homs, before the cameraman runs into an alleyway for cover.

Amateur video cannot be independently verified

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