
They were identified as Kanthima Taemkhru, 29, and Somsak Saeung, 38.
The two were arrested under the warrant issued by the Criminal Court on Sunday on charges of disseminating false information via computer network, causing damage to other people.
Somsak was arrested at a house on Soi Prasarnban in Din Daeng district.
Kanthima from Sukhothai was arrested at her apartment in Chatuchak district.
Central Investigation Bureau Commissioner Pol Lt-Gen Thangai Prassachaksattru and his deputy, Pol Gen Panya Mamen, rushed to the CSD head office Sunday to interrogate the two suspects.
Sources said Thangai instructed all investigators not to give any information to the media.
The sources said the interrogation found that the two were not the ones who doctored the audio clip to sound that the prime minister ordered the use of violence against red-shirt protesters.
According to the sources, the two simply mailed out the copies of the audio clip after one of them got a CD containing the clip.
Investigators are now finding out from whom one of the suspects had obtained the CD.
Police are also seeking a warrant for searching the SC Assets for more evidence.
The two suspects were released on bail after using B100, 000 in cash each as a guarantee.