Syria: Human Rights Watch says attacks amount to war crimes
11 April 2013 Last updated at 14:23 BST
The Syrian government has been accused of repeatedly carrying out indiscriminate and sometimes deliberate attacks on civilians, amounting to war crimes.
The group Human Rights Watch has drawn up a comprehensive survey of attacks by Syrian military aircraft against rebel-held parts of the country.
The organisation's investigators documented attacks at 50 different sites, in which it said more than 150 civilians were killed.
Jim Muir reports from Beirut.