They had been placed under house arrest prior to being arrested.
Jammu and Kashmir's former chief ministers Mehbooba Mufti and Omar Abdullah were arrested on August 6.
They had been placed under house arrest on the evening of August 5, reported NDTV.
The government's move to place Mehbooba Mufti and Kashmir valley's two other mainstream leaders Omar Abdullah and Sajjad Lone had provoked a torrent of tweets from the two leaders.
Omar Abdullah has already indicated that his party might challenge the government's move in court.
In a statement this morning after Union Home Minister Amit Shah's announcement in parliament, Abdullah said: "The scrapping of articles 370 and 35A raise fundamental questions on the State's accession because that was done on the very terms enunciated in these articles. The decisions are unilateral, illegal and unconstitutional and will be challenged as such by the National Conference. A long and tough battle lies ahead."
Mufti, the chief of People's Democratic Party that ruled the state along with the BJP till their partnership ended in June last year, has been vocal about the events in the state since the troop build-up started last week.
In her tweets, she had called the day the "darkest" in Indian democracy and accused the government of having "sinister" designs.
Mehbooba Mufti has been taken from her Srinagar home to an undisclosed government guest house where she will reside until further notice.