Thailand's attorney general will postpone a hearing with influential former Prime Minister Thaksin Shinawatra on whether to indict him over a royal insult complaint, his lawyer said Wednesday.

"The attorney general is still investigating the case," Winyat Chartmontri said, adding that prosecutors would advise of the next hearing date later in the day.

The attorney general's office was not immediately available for comment, although a briefing had been scheduled.