A bomb crashes down on what activists say is the beseiged Syrian city of Homs.

Reuters is unable to verify the content of the video.

But anti-government rebels say it shows tank and mortar fire raining down on the city.

Homs has become a key battleground in year-long uprising against Syrian president Bashar al-Assad.

At least 24 people died here on Saturday, part of an attempt by government forces to wrest control of the city from rebel fighters.

Andrew Raven, Reuters.