The PSNI are increasing patrols after four recent attacks in Belfast and Londonderry
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PSNI: Increased patrols to counter 'severe' dissident threat

There will be more checkpoints and patrols in Northern Ireland in the next few days, police have said.

The "high visibility operation" aims to counter a "severe" dissident republican threat, the Police Service of Northern Ireland said.

BBC News NI's Helen Jones reports.