Veteran republican Marian Price has been arrested by police investigating dissident activity in the North
She was detained in west Belfast today under terrorism legislation by detectives from the serious crime branch and has been taken to Antrim serious crime suite for questioning.
Price, 57, and her sister Dolours were among those convicted of a 1973 bombing outside the Old Bailey in which one person was killed and almost 200 others injured.
She split with the mainstream republicans of Sinn Fein around the time of the Good Friday Agreement in 1998.
She is now a spokesman for the 32 County Sovereignty Movement, considered to be the Real IRA's political wing.