We now have a lot more information on Tuesday evening's bomb incident, but police still have much work to do to find everyone involved.
Soldiers are brought in to help survey the scene at Saman Metta Mansion in Bang Bua Thong district, Nonthaburii . TAWATCHAI KEMGUMNERD
Blast toll climbs to four
Police believe bomber was killed in explosion
Homes across from the crime scene were also damaged. TAWATCHAI KEMGUMNERD
Police believe the bomber responsible for the powerful blast at a Nonthaburi apartment on Tuesday died in the explosion.
They have also linked the man, a militant red shirt supporter, to at least three other bomb threats and blasts in Bangkok in recent weeks.
The blast at the five-storey Saman Metta Mansion in Bang Bua Thong district, Nonthaburi, is now known to have killed four people after police yesterday found a severed arm in a room rented by the man earlier identified as their suspect, Chiang Mai native Samai Wongsuwan.
The blast which took place at 6pm on Tuesday at room 202 ripped apart two units of the apartment block.
Police are undertaking DNA tests on the body part found in Mr Samai's room, but believe he probably died in the blast as he was assembling the bomb.
Nine people were injured in the blast, including two who are in a critical condition.
Forensic officers combing the wreckage yesterday found batteries, electrical tape, parts of air conditioner coolant storage cylinders, fire extinguishers and electronic circuits. They believe Mr Samai hoped to detonate the bomb in about a week, although they do not know where.
National police chief Wichean Potephosree said explosive materials found at the site were similar to those discovered at the sites of four previous bomb threats and blasts: near the Royal Turf Club, Santirat Wittayalai school, a parking lot at The Mall department store chain's Ngam Wong Wan branch and the Public Health Ministry.
The police chief said the apartment bomb was made of 10kg of TNT explosives.
Pol Gen Wichean said the investigation into the Bang Bua Thong explosion might shed more light on more than 10 bomb threats and attacks in the capital.
Deputy police chief Panupong Singhara na Ayutthaya is in charge of the bomb cases.
A source close to the investigation said the apartment blast bore the stamp of more than 10 bomb threats and attacks in Bangkok in recent weeks.
"We are trying to establish if they [the bombs] are the work of the same group," the source said.
Police say suspected bombmaker Samai rented the room on Sept 23.
A driver's licence with his name was found near the body part, said an officer at the Crime Suppression Division who is involved in the case.
DNA tests are being undertaken to confirm his identity.
A security camera at the apartment also captured Mr Samai seeing off a married couple hours before the blast, said the CSD officer who requested anonymity.
A native of Chiang Mai's Hang Dong district and a staunch red shirt supporter, Mr Samai was arrested in Chiang Mai in connection with an assault on a group of yellow shirt supporters on Aug 23 last year. He was suspected of throwing a grenade at an office of yellow shirt supporters.
He was believed to be involved in an explosion of a car in the parking lot of Poseidon massage parlour in Bangkok on April 5.
A manhunt is now under way for the married couple seen at the apartment with Mr Samai carrying fertiliser sacks before the blast.
Pattaraporn Petnil, 38, a housekeeper, said the couple, travelling in a Toyota pickup truck with Narathiwat licence plates, visited Mr Samai's room often.
She saw the three of them entering the apartment at 11am on Tuesday and making a number of trips between the room and the car carrying pillows and fertiliser sacks.
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blast – an explosion การระเบิด
(death toll) – the number of people killed ยอดผู้เสียชีวิต
linked – connected เชื่อมโยง
militant – someone who uses violent methods to achieve something นักรบ
threat – saying or indicating that you might do something bad or harmful, especially in order to make someone do something การขู่เข็ญ การคุกคาม ทำให้กลัว
sever – to break or separate, especially by cutting ตัดขาด
rent – to pay money for the use of something for a period of time เช่า
identify – to specify who someone is ระบุชื่อ
suspect – a person who is thought to have committed a crime ผู้ต้องสงสัย
native – someone who was born in a particular place ชาวพื้นเมือง
rip – to tear something quickly and with a lot of force ฉีก, กรีด, ตัด
undertake – to do เข้าทำ, ดำเนินการ
assemble – to make something by joining separate parts ประกอบ
injured – hurt in an accident or attack ซึ่งได้รับบาดเจ็บ
critical condition – very seriously ill or injured and possibly die อาการหนัก
forensic – relating to the use of scientific methods to solve crimes or to find out why something happened เกี่ยวกับนิติวิทยาศาสตร์
comb – to search a place or an area very carefully in order to find something ค้นหาอย่างละเอียด
wreckage – the parts of a vehicle or building that remain after it has been severely damaged ซากตึกบ้านเรือนที่ถูกทำลาย
cylinder – an object shaped like a wide tube; a metal container for gas or liquid กระบอก
storage cylinder – a metal tube for keeping things until they are needed กระบอกเก็บรักษาสินค้า
fire extinguisher – a device which contains water or a special gas, powder or foam (= a mass of small bubbles) that is put onto a fire to stop it burning เครื่องดับเพลิง
detonate – to cause to explode ทำให้ระเบิด
site – a place where something happened ที่เกิดเหตุ
branch – an office or shop representing a large company or organisation in a particular area สาขา
investigation – the process of trying to find out all the details or facts about something in order to discover who or what caused it or how it happened การตรวจสอบหาข้อเท็จจริง
shed light on – to provide information or details to help us understand something
in charge of – to be in control of an activity and to check that everything is being done correctly ดูแล ควบคุม
source – someone who gives information แหล่งข่าว
bear the stamp of – to be typical of something; to have similar characteristics to มีลักษณะคล้าย
establish – to discover, prove, or decide that something is true พิสูจน์, แสดงให้เห็น
licence – an official document that gives someone permission to do or use something ใบอนุญาต
suppression – stopping an activity from happening, in this case, criminal activity การปราบปราม
identity – who someone is
see off – to say goodbye to someone
anonymity – when someone's name is not given or known การไม่ระบุชื่อ
staunch – always loyal in supporting a person, organization or set of beliefs or opinions จงรักภักดี, แข็งแรง
assault – attacking someone violently การทำร้าย
suspect – to believe that something is true, especially something bad เป็นที่สงสัยว่า
grenade – a small bomb that someone throws or fires from a gun ลูกระเบิดเล็ก
manhunt – an organised search for a person, especially a criminal การล่าหัว การตามล่าจับกุม
fertiliser – a natural or chemical substance which is spread on the land or given to plants, to make plants grow well ปุ๋ย
sack – a large strong bag for storing and carrying things กระสอบ, ถุงขนาดใหญ่
pillow – a soft object on which you rest your head in bed หมอน
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