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Detectives investigating NIreland car bomb make 5 arrests

Last Updated Jan 21, 2019 at 8:50 am PDT

FILE PHOTO: Forensic investigators at the scene of a car bomb blast on Bishop Street in Londonderry, Northern Ireland, Sunday, Jan. 20, 2019. Northern Ireland police and politicians have condemned a "reckless" car bombing outside a courthouse in the city of Londonderry. The device was placed inside a hijacked delivery vehicle and exploded Saturday night as police, who had received a warning, were evacuating the area. There were no reports of injuries. (Niall Carson/PA via AP)

LONDON — Detectives investigating a car bomb outside a courthouse in Northern Ireland say they have arrested five men, as new reports of hijacked vehicles led to the evacuation of residents in the city of Londonderry.

Police have said they suspect Irish Republican dissidents were behind the explosion Saturday that took place after attackers hijacked a pizza delivery vehicle. Politicians have condemned the attack.

Four people were arrested on Sunday and a fifth on Monday.

The new incidents Monday prompted security alerts, with nearby residents evacuated and Army bomb disposal experts deployed.

Northern Ireland’s power-sharing government has been suspended for two years because of a dispute between the main Protestant and Catholic political parties. Uncertainty about the future of the Irish border after Brexit is adding to tensions.