This could be the most poignant tribute to Robin Williams yet

This, from the people of Kafranbel, Syria, to Robin Williams is not just a tribute to the late actor: it’s a plea for intervention.

So say Vox, who report that every Friday the citizens of the city in Idleb, north west Syria, release a photo or sign to draw attention to the ongoing crisis in the country.

Kafranbel activist Raed Fares told the New York Times earlier this year their signs are designed to reach an international audience.

We keep track of everything happening in the news, all over the world, and if we find something that can help our cause, then we will use it. Appealing to a global audience is very important to us. Our revolution is a people’s revolution, so it is only natural that we seek out the support of people around the world.

Here's how they reacted to the Boston bombing and Trayvon Martin shootings.