Marian Price is being questioned by police
A former IRA woman who was jailed for bombing the Old Bailey in London, has been arrested in connection with the shooting of two soldiers in Antrim.
Marian Price, who is 55, was arrested in west Belfast on Tuesday.
She is being held in connection with the Real IRA murders of two soldiers at Massereene Army base in March.
A 39-year-old man was also arrested in County Tyrone. A total of 12 people have been arrested in connection with the shooting, with two charged.
A police spokesperson said the arrests, made on Tuesday morning, were part of an on-going search operation.
The pair have been taken to Antrim police station for questioning, the spokesperson added.
Ms Price and her sister Dolours were among those convicted for the 1973 bombing outside the Old Bailey in which one person was killed and almost 200 others were injured.
She went on hunger strike in prison and was highly regarded by people in the republican movement.
She split with the mainstream republicans of Sinn Fein around the time of the Good Friday Agreement in 1998.
In 2001 she told the BBC that Sinn Fein had committed "treason and treachery" and "sold out on all republican principles and core values".
She is now a spokesperson for the 32 County Sovereignty Movement, considered to be the Real IRA's political wing.
Sappers Patrick Azimkar, 21 and Mark Quinsey, 23, were shot dead outside Massereene barracks.
Two men, prominent republican Colin Duffy, 41, and Brian Shivers, 44, from Sperrin Mews in Magherafelt, have been charged with the murders.