"We do not spend our time listening to the telephone calls or reading the emails of the majority," GCHQ boss Sir Iain Lobban told the committee.
More top news
Hollywood actor Jim Carrey has failed in his attempt to get a wrongful death lawsuit over his ex-girlfriend's suicide thrown out of court.
Talks at Stormont aimed at restoring power-sharing have adjourned with little sign of the DUP and Sinn Fein reaching an agreement.
On Wednesday, the rain will roll northwards - a few hours of solid rain in the east and over the Pennines.