About 30 homes have been evacuated after a "small homemade explosive" was found by police during a house raid.
Officers found the device at the property on William Street in Stubbins, Lancashire, earlier.
Lancashire Police said the house was cordoned off and surrounding properties and roads evacuated "as a precaution", adding that there was "not believed to be any immediate threat".
Three people were arrested on suspicion of manufacturing explosive devices.
Bomb disposal experts have been working on the device.
Displaced residents were allowed back to their homes mid-evening.