A Syrian man walks through the damaged street in Douma district, east of the capital Damascus, Syria, on April 20, 2018 (Xinhua/Hummam Sheikh Ali)
A Syrian boy looks out of the window in Douma district, east of the capital Damascus, Syria, on April 20, 2018. (Xinhua/Hummam Sheikh Ali)
Photo taken on April 20, 2018 shows damaged buildings in Douma district, east of the capital Damascus, Syria. (Xinhua/Hummam Sheikh Ali
A Syrian man rides a bicycle through the damaged street in Douma district, east of the capital Damascus, Syria, on April 20, 2018. (Xinhua/Hummam Sheikh Ali)
Photo taken on April 20, 2018 shows damaged tanks that belong to the Islam Army rebels on the street in Douma district, east of the capital Damascus, Syria. (Xinhua/Hummam Sheikh Ali)
Syrian children play in a garden at a largely-devastated district in Douma district, east of the capital Damascus, Syria, on April 20, 2018. (Xinhua/Hummam Sheikh Ali)