Story highlights Police plan to take suspect, another man back to scene of crime on Saturday

17 arrest warrants issued for others wanted in connection to bombing, which killed 20

Adds that authorities say additional suspect suspected of triggering bomb

Bangkok, Thailand (CNN) A man who has been in police custody in Thailand since August 29 has been identified as the primary suspect in a bombing that killed 20 people at Bangkok's Erawan Shrine last month, Thai police said Friday.

After the man admitted he was the suspect seen in video in a yellow shirt, he confessed to the bombing, Thailand national police spokesman Prawut Thavornsiri told reporters.

Police used new surveillance images to confirm they had the man responsible for the bombing, the spokesman said. The images showed the suspect walking into a restroom and changing his clothes before he walked out.

"He did admit that the man in the photo was him, and each of his admissions they became all connected. And finally he admitted it all," Prawut said.

In addition, another man -- named as Yusufu Meerailee -- has allegedly confessed to Thai police that he triggered the bomb at the Erawan Shrine.

Read More