Thai authorities on Wednesday released an official police sketch of the main suspect in Monday's bombing of a Bangkok shine. The attack killed 20 people and injured over 100. Here's the sketch: On Tuesday, police released CCTV footage of the suspect taken right before the attack. In the video, the alleged bomber is wearing a bright yellow shirt and is holding a backpack. "The yellow shirt guy is not just the suspect. He is the bomber," a police spokesman told the Associated Press. Police said on Wednesday said they believed the suspect had accomplices. "He didn't do it alone, for sure. It's a network," saidThai national police chiefSomyot Poompanmoun. The bomb had been placed inside the Erawan Shrine, a sacred Hindu site that is popular with both visitors and locals. Fears have emergedthat tourism, which is one of Thailand's main industries, might suffer in the aftermath of the attack. -- This feed and its contents are the property of The Huffington Post, and use is subject to our terms. It may be used for personal consumption, but may not be distributed on a website. Click here to read full news..