Syria crisis: Amateur film 'shows Damascus bloodbath'
This video contains graphic images of the victims of Syria's conflict
Large numbers of government troops have been sent to the country's second city, Aleppo.
It has been the focus of intense fighting in the past few days. Activists say tanks and armoured vehicles have been redeployed from their positions near the Turkish border.
Government forces have largely repelled a rebel assault on Damascus, with unverified amateur footage appearing to show the bloody aftermath.
A sustained assault by rebels earlier this month on the capital has seen a dramatic upsurge in violence there.
Ian Pannell reports.