Kamphi Ditthakorn, deputy secretary-general of the House of Representatives, who is heading up the fact-finding team investigating the scandal, said technicians had determined the brand of electronic device capable of sending data to the display screen in Parliament without having to use a password, and will try to find the phone number used, The Nation reported.
It was expected to take a couple of days to come up with the number, the Bangkok newspaper said.
Kamphi said about 86 people were found to have used mobile devices on April 18, the day the picture of a partially unclothed woman was displayed on the House chamber's WiFi-equipped TV screens during a televised debate of a constitutional amendment.
Lower House Secretary-General Pitoon Pumhirun said he didn't know technology allowed images to be sent wirelessly to a TV screen without a password or authorization. He said he would consult with experts to ensure there isn't another such incident, whether it was intentional or accidental.
It's the second instance of a sex photo turning up in Parliament recently. Member of Parliament Nutt Bantadtan was photographed during a recent session looking at an image of a scantily dressed woman on his phone. Paijit Sriworakhan, chairman of the House Committee on Parliamentary Affairs, said the panel would meet Thursday to discuss that matter.
Nutt said a friend had posted the photo to his social network account and he was trying to delete it.