From BBC

The suspect, in yellow, deposits a backpack on a bench before walking off
Bangkok bomb
Video CCTV of Bangkok bomb suspect emerges
Video footage has emerged of a key suspect police want to question in connection with the deadly bomb blast in the Thai capital, Bangkok.
The footage, from a CCTV camera, shows a man in a yellow shirt leaving a backpack in the Erawan Hindu shrine.
At least 20 people died in Monday’s blast, about half of them foreigners, and more than 120 were injured.
In a separate attack on Tuesday, an explosive device was thrown at a pier in Bangkok, but no-one was hurt.

Nationals from China, Hong Kong, the UK, Indonesia, Malaysia and Singapore are among the foreigners killed in the attack.
Still images of the suspect had already been released.
In the new footage, he is shown carefully and deliberately removing his backpack inside the shrine, getting up without it and immediately leaving the scene.
The spot where he was sitting is precisely where the bomb went off a few minutes later, says the BBC’s Jonathan Head in Bangkok.
“There is a suspect… we are looking for this guy,” Prime Minister Prayuth Chan-ocha told reporters.
Authorities were “quite close” to identifying the suspect, Thai government spokesman Maj Gen Weerachon Sukhontapatipak told the BBC, but other leads were also being pursued.
He said no motive was being ruled out, but that the bomber did not appear to be Thai and the character of the bombing was “quite different” from previous bombings by southern Thai insurgents.
He said security at transport hubs and tourist sites was being beefed up.
The bomb was detonated at about 19:00 local time (12:00 GMT) on Monday when the shrine, and the nearby Ratchaprasong junction, were crowded.
Location of where the backpacker left his backpack
Mr Prayuth called it the “worst ever attack” on Thailand.
“There have been minor bombs or just noise, but this time they aim for innocent lives. They want to destroy our economy, our tourism.”
In Tuesday’s incident, a device – possibly a grenade – was reportedly thrown at the busy Sathorn pier in Bangkok.
Divers retrieve and send up surviving pieces of an explosive device to be inspected at Sathorn pier, Bangkok, Thailand, on Tuesday after it was thrown towards the pier but exploded in the water without any casualties
Divers retrieve pieces of a device at Sathorn Pier, Bangkok, after it was thrown at the pier on Tuesday but bounced into the water, exploding on impact without hurting anyone
It landed in water where it exploded harmlessly, but police said it could have caused many injuries.
Monday’s bomb was clearly placed to cause maximum casualties, says our correspondent in Bangkok.
In currency trading, the Thai baht fell to its lowest level in six years over concerns about the impact on tourism.
Analysis: Pavin Chachavalpongpun, Center for Southeast Asian Studies, Kyoto University
There are suggestions this could be related to the Muslim separatist conflict insouthern Thailand, but the political violence has been limited to the three southern provinces – never the capital.
Others have mentioned the Muslim Uighur minority in China. They are unhappy that Thailand deported Uighur refugees back to China, where the minority complain of persecution, and might have wanted to punish the Thai state, the thinking goes. But we don’t know enough at this point to support this theory.
However, international terror networks usually claim responsibility quickly after the incident, which hasn’t happened in this instance so far.
One thing is clear – this is a failure of the government’s intelligence work.
National police chief Somyot Poompummuang described the device as a 3kg (6.6lb) pipe bomb – an improvised device where explosive material is put in a sealed cavity to maximise the explosive impact.
“The impact was so strong it sucked us forward and then pushed us back,” one witness, Leify Porter, from Australia told the BBC.
She said she had seen “very graphic” scenes at the site of the explosion.
Maj Gen Weerachon Sukhontapatipak says it is not known if the pier explosion is linked to Monday’s blast
Erawan shrine is dedicated to the Hindu god Brahma, but is also visited by thousands of Buddhists each day.
It sits between a five-star hotel and a popular shopping centre on the Ratchaprasong intersection, which has been the centre of political demonstrations in recent years. Bangkok has seen a decade of sometimes violent rivalry between political factions.
The military took over the country in May last year, removing an elected government following months of unrest. The capital has been relatively calm since then.
IMAGES:
Thai police officers and emergency staff inspect the scene where Monday’s bomb was detonated outside Erawan Shrine, central Bangkok, Thailand on Tuesday
Authorities believe the bomb was targeting foreign tourists – but most of the dead and injured are Thai
Workers clean up debris at the site of Monday’s explosion on Tuesday
Forensic evidence has been collected and a clean-up operation is under way
A message of condolence and roses are left for victims of the bomb blast at Rajprasong intersection near the Erawan Shrine in Bangkok, Thailand, on Tuesday
Flowers have been left and many bereaved are now facing the grim task of identifying the remains of loved ones
For more on this story and video go to: http://www.bbc.com/news/world-asia-33969621