A man has been arrested after two suspect devices were found outside houses in Londonderry on Easter Sunday.
Residents in several properties were evacuated while an area close to the city's police station on Strand Road was among those affected by the disruption.
The 39-year-old suspect was detained in the city and taken to a Belfast police station for questioning, the Police Service of Northern Ireland (PSNI) said.
Nationalist SDLP leader Colum Eastwood said: "Those responsible for dragging families out of their homes onto the street on Easter Sunday morning are nothing but thugs.
"It's well past time these faceless cowards went away and got off the backs of the people in Derry.
"Derry is a wonderful city filled to the brim with talent and hardworking people trying to get on in life - yet these 'hoods' think they can drag us back and continue to limit the opportunities for our people."
The security scares come just three days after journalist Lyra McKee was shot dead during disruption in the city on Thursday evening.
However, police said no link to terrorism or the murder of the 29-year-old is being suggested.
During Sunday's alert a section of the Strand Road was closed to traffic. Road closures were also put in place in Iniscarn Road, Harty Court and Moss Park.
