Thai police are looking for a man who is seen in video wearing a yellow t-shirt at the scene of yesterday's deadly bombing in Bangkok. 

Video posted on Thai media shows the man sitting on a bench in a downtown crowded shrine, taking off a backpack and walking away. 

Police photos appear to show the same man. Police say not only is he the suspect, but he's the bomber who killed 20 people and left more than 100 wounded.

Today, a second explosion went off at a ferry pier in Bangkok, but no one was hurt. Police say the explosive device was thrown from a bridge and blew up after falling into the river below.