DAP leader Teresa Kok has also been detained under the Internal Security Act - the third person to be detained without trial today.
It is learnt that the Selangor senior executive councillor and Seputeh parliamentarian was stopped by the police at about 11.18pm on her way back from a function in Kuala Lumpur.
She was arrested after her vehicle was blocked by three police patrol cars.
Deputy inspector-general of police Ismail Omar said that Kok's arrest was made under Section 73(1) of the Act.
According to party stalwart Lim Kit Siang, the three police cars with over 10 officers stopped Kok at the entrance of her condominium and took her away.
He said that she was arrested while returning from a Mooncake Festival reception held at her constituency office.
Puchong member of parliament and lawyer Gobind Singh toldMalaysiakini that Kok was being held at the Wangsa Maju district police headquarters for questioning.
He said that the police were not entertaining his request to meet Kok.
Kok has been in news in recent days - especially in the Malay dailies - after it was claimed that she had told mosque officials in Kota Damansara, Sri Serdang and Puchong Jaya to tone down the call to prayer.
Kok however had denied the allegations. It could not be immediately ascertained if her arrest has anything to do with these claims.
One of the mosques, Masjid Kota Damansara, has clarified today that a damaged amplifier has resulted in the calls to prayers to be made without the aid of a PA system.
In Penang, chief minister and DAP secretary-general Lim Guan Eng said the party would be holding an emergency meeting tomorrow to discuss the matter.
Earlier today, Malaysia Todayeditor Raja Petra Kamaruddin and Sin Chew Daily journalist Tan Hoon Cheng were also arrested under the Act.
According to sources, there could be more arrests to come.