Police seek new suspects in Bangkok blast as more bomb materials found

Police investigating the deadly Bangkok blast said they were seeking a Thai woman and an unidentified man after bomb-making materials were discovered over the weekend in a second apartment raided by police.
 
The blast that hit the Erawan shrine in a busy shopping district on August 17 was Thailand's worst single mass-casualty attack, with most of the victims ethnic Chinese tourists from across Asia.
 
The new lead came after police said they made a breakthrough in their case, detaining an unnamed foreign man on Aug. 29 morning at another flat where detonators, industrial pipes and ball-bearings were found.
 
In a televised broadcast on Aug. 31 national police spokesman Prawut Thavornsiri showed a photograph of the wanted Thai woman, taken from an official identity card, showing her wearing a black hijab.    

He named her as 26-year-old Wanna Suansan -- the first time a suspect in the bombing probe has been identified.
 
A sketch of an unidentified man with a moustache was also broadcast.
 
Prawut said the two were believed to be renting a second room where more bomb equipment was found, as police search for possible accomplices to the shrine bombing.    

"We found fertiliser bags, watches, radio controls -- parts to make bombs and electric charges," Prawut told AFP on Monday, shortly before the national broadcast.    

He said the items were found during a raid on an apartment in the northeastern suburb of Minburi over the weekend.
 
He did not detail when the raid took place but added that the type of fertiliser found was urea based.    

Urea nitrate is a compound commonly used in homemade bombs.
         
Mystery has surrounded the unprecedented attack on...