Author Syed Hussein Al-Attas who was detained Thursday morning while selling his book, said to have insulted the Sultan of Johor, at the Putra World Trade Centre (PWTC), the venue of the 66th Umno General Assembly, was later freed on bail.

Dang Wangi police chief, ACP Zainuddin Ahmad said the author, also known as Pak Habib, 71, was arrested at 11am and taken to the police operations room at PWTC for his statement to be taken.

"We freed him on bail at 4pm," he said when contacted.

Police also seized 13 books written by Pak Habib, who is also the father of blogger and paranormal practitioner Syed Abdullah or Uncle Seekers, who, prior to this, was detained by police for allegedly slandering the Sultan of Johor on his blog www.uncleseekers.blogspot.com