Vehicles pass by a digital billboard showing the sketch of a man suspected to be the Bangkok bomber in central Bangkok on August 22, 2015. (AFP/Jerome Taylor)

Vehicles pass by a digital billboard showing the sketch of a man suspected to be the Bangkok bomber in central Bangkok on August 22, 2015. (AFP/Jerome Taylor)

Vehicles pass by a digital billboard showing the sketch of a man suspected to be the Bangkok bomber in central Bangkok on August 22, 2015. (AFP/Jerome Taylor)

August 22, 2015 9:52 AM (UTC+8)