Northern Ireland police on full alert

Updated at 8:12 am on 24 April 2011

Police in Northern Ireland are on full alert over Easter weekend, warning that there is a "severe threat posed by terrorists".

Patrols and security checkpoints were being stepped up police warned the public to be vigilant and asked for more help in catching those involved in violence.

The BBC reports that it is feared dissident republicans are preparing to attack police officers over the Easter holiday period.

The warning follows a car bomb attack three weeks ago that killed Northern Ireland police officer Constable Ronan Kerr, a 25-year-old Catholic.

The attack that was claimed by a previously unknown group.

The recent increase in dissident republican activity coincides with the Northern Ireland Assembly election campaign.

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