Thai police have asked the operators of the "line" instant messaging application to access online chats.
There are technology crime suppression commander Vejjajiva Paoin Tuesday that police suspected them to review the crimes, including a statement of the Thai monarchy, arms dealing, prostitution and drug dealing user data.
Thailand has strict lese majeste law and trying to scrub the Internet of the king and his family the key statements.
Vejjajiva said that his unit close to the application of operators, Naver in Korea, and in Japan, where it is based on a server and want to cooperate.
Line has more than 100,000 users in Thailand.
Last week, police questioned four people posted on Facebook coup rumors and threaten anyone "like" postings charging.