Police investigating a Stoke-on-Trent gang suspected of promoting extremist views have finished searching the last of five houses.
Staffordshire Police raided the five homes under the Terrorism Act on Tuesday and found a "significant amount" of property, including literature, documents and computers.
Four vehicles were also seized.
The searches included three houses in Cobridge, one in Burslem and one in Tunstall.
No-one has been arrested, and a Staffordshire Police spokesman said officers had finished searching the last house in Cobridge.
"Searches at the remaining house in Cobridge have now finished and officers involved in the investigation have left the location.
"The investigation is ongoing and detectives are continuing to examine and assess items recovered from the addresses," he said.
The raids were part of an investigation launched last autumn.
Police said they had acted on the community's concerns and the operation was the "latest stage of the force's investigation to resolve them and help establish the facts".
They said the operation posed no direct risk to public safety.