Special envoy Kofi Annan is in Damascus, Syria, calling on "every individual with a gun" in Syria to lay down arms, saying he is horrified by the weekend massacre in the region of Houla that left more than 100 dead.
Activists say the deaths were at the hands of government forces, but the Syrian government has denied that its forces carried out the killings, and observers say that it may have been militants allied with the Syrian military.
Russia's foreign minister says opposition forces share the blame because some of the dead were in an area controlled by rebels.
- Jonathan Marcus, the BBC's diplomatic correspondent
This segment aired on May 28, 2012.