Police investigating the murder of Constable Ronan Kerr six years ago have arrested two men.
Constable Kerr, 25, was killed by a booby-trap car bomb in Omagh on 2 April 2011. The attack was carried out by dissident republicans.
A 27-year-old man has been arrested in Omagh and a 40-year-old man was brought into police custody from prison.
They are being questioned under the Terrorism Act in connection with the police officer’s murder.