By Mark Simpson
Copyright bbc
A BBC spokesperson said: “MI5’s admission that it illegally obtained communications data of a BBC journalist is a matter of grave concern.
“It raises serious and important questions that we will continue to pursue.”
Mr Kearney became home affairs correspondent at BBC News NI in April 2006, having previously worked for the BBC NI Spotlight programme and as a producer in the Belfast newsroom.
Before that, he was political correspondent at the Belfast Telegraph.
Last year, it emerged that lawyers acting for the BBC had written to the Investigatory Powers Tribunal about alleged police surveillance of Mr Kearney.
He presented a programme about the Police Ombudsman’s Office in 2011.
Mr Kearney’s case emerged as part of proceedings involving two other Belfast journalists, Barry McCaffrey and Trevor Birney.
Mr Kearney is now the northern editor of RTÉ News