The new image will promote #withsyria, a campaign to rally support for victims of the conflict. It is based on a stencil first seen in London in 2002. In a statement on his website, the artist made reference to the 15 children whose detention for writing pro-democracy graffiti triggered the first protests against the Assad regime in March 2011. The protests "led to an outbreak of violence across the country that would see a domestic uprising transform into a civil war displacing 9.3 million people from their homes".
Thursday will see a "global recreation" of the Banksy artwork, with red balloons being released simultaneously in squares around the world to mark the conflict's anniversary. A vigil will be held in London's Trafalgar Square from 18:00 GMT. Actor Idris Elba and British band Elbow have also lent their support to the campaign. Edited from BBC