A "woman wearing a black shirt" is being sought by Thai police in connection with the deadly bombing at Bangkok's Erawan Shrine, a senior police spokesman said Thursday night, according to the AFP news agency.
"I would urge her to come forward to provide information to police," Lieutenant-General Prawut Thavornsiri told reporters without elaborating, as police said on Thursday that they had questioned and freed one man who handed himself in after being seen on CCTV at the shrine moments before the blast.
However, the prime suspect remains at large.
A Thai man wanted for questioning after he was seen on security camera footage "met police and was released", Prawut was quoted as having told reporters, adding a second man from China in the same shot had already left the country - but neither were "likely involved".
Earlier, the BBC reported that both men had handed themselves in to the police.
The main suspect, believed to be a foreigner in a yellow shirt seen depositing a backpack at the scene was still at large, he added.
On Wednesday, the chief of Thailand's national police force suggested that the deadly bombing at was carried out by "a network."
No one has claimed responsibility for the attack, though some sources allege the investigation is focusing on a revenge motive by Uigher terrorists in response to the Thai government's deportation of Chinese Muslim migrants in July.
On Tuesday, hours after the blast, Thailand’s army chief hinted that it may have indeed been a terror attack.
While he did specifically say the bombing was a terrorist attack, he did say the bombing did not match the tactics used by separatist rebels in southern Thailand.