‘Superman’ Hew Kuan Yau was arrested at the Penang Asia Comic Cultural Museum in Komtar at 1.17pm on Monday over a Facebook post.
Three policemen came to the museum, where Hew is the curator, and detained the DAP orator.
The controversial post, which was uploaded by Hew at 6.16pm on March 13 on his personal Facebook page, allegedly insulted the Prime Minister Najib Razak and his wife Rosmah Mansor.
He was brought to the George Town district police headquarters.
He is expected to be handed over to Johor police for further investigations.
In his Facebook posting, Hew has uploaded the movie poster of ‘Beauty and the Beast’ with an attachment of a photograph of Najib and Rosmah captioned with a derogatory remark.