The PSNI is investigating a series of hoax bomb calls targeting railway stations in England have carried out searches in Derry.
Detectives said the searches are in relation to an ongoing investigation into dissident republican activity.
A PSNI spokesperson said: “Today’s searches are part of an investigation working alongside Counter Terrorism Policing South East (CTPSE) into a series of hoax bomb calls which targeted railway stations in England between April 20-23.
“These searches demonstrate our commitment to disrupting the activities of this small group of people who are intent on causing fear in our society.
“As always, our priority is to protect communities and keep people safe from harm.”