Suspect in Thai blast had bomb-making material

The deadly explosion at Bangkok's Erawan Shrine -- a spot popular with tourists and locals -- wreaked havoc on August 17.

Authorities have said the main suspect they're looking for is an unidentified foreigner, the man in the yellow T-shirt, who was caught on surveillance video hiding a backpack under a bench at the shrineminutes before the bomb detonated.

Bangkok blast victim: 'I lost everything'

At least 10 people may have taken part in the bombing, but the attack is unlikely to be linked to international terrorist groups, Thai authorities said.

Police said a week ago that they no longer believed that three other people seen near the main suspect on surveillance video were involved in the attack.

There has been no claim of responsibility for the bombing. Thai authorities haven't said what they think the motive for it might have been, other than making vague references to unspecified people or groups who want to hurt Thailand's tourism industry and economy.

Thai security forces are sharing information with Interpol, the global police organization, and with intelligence agencies from allied countries, officials said.

Royal Thai Police Commissioner Gen. Somyot Poompanmoung said that he believes "several teams" were involved in the preparation and execution of the attack, which killed at least 20 people and wounded more than 120.

"This operation was carried out by a big network," he said.

Police offered a reward for information leading to the suspect's arrest, but it's not clear if that was a factor in Saturday's arrest.

http://edition.cnn.com/2015/08/30/asia/thailand-bangkok-bombing-arrest/index.html

Structure of the Lead：

     WHO-the man in the yellow T-shirt

     WHEN-August 17

     WHAT-not given

     WHY- not given 

     WHERE-Bangkok's Erawan Shrine

     HOW- hiding a backpack under a bench at the shrineminutes before the bomb detonated.

Keywords：
1.wreak:訴諸
2.havoc:大破壞
3.surveillance:監視
4.commissioner:委員
5.Interpol:國際警察組織