A man has been arrested after two "suspect devices" were left outside houses in Londonderry.
Homes were evacuated as part of a number of security operations that began in the city on Sunday morning.
Iniscarn Road, Harty Court, Strand Road and Moss Park have been reopened and residents have been allowed to return home following the discovery of non-viable devices.
Suspicious objects were discovered at both locations and were examined by Army bomb experts before being removed.
The Police Service of Northern Ireland (PSNI) said that diversions are in place and that it can "only apologise for the inconvenience".
Detectives investigating the incidents have taken a 39-year-old man to a police station in Belfast for questioning.
It is understood that police are not investigating a link between the incidents and the murder of journalist Lyra McKee during rioting in the city on Thursday.