A 55-year-old man has been arrested after a "potentially volatile substance" was discovered at a flat in Newhall, forcing the evacuation of up to 200 people.
Derbyshire Police said the evacuation was a precaution, and residents would be allowed to return to their homes as soon as possible.
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Loudspeakers at the border have been switched off as a gesture of goodwill ahead of a meeting between the leaders of North and South Korea.
Liam Colgan vanished on February 10 while celebrating his brother’s stag-do in the German city.
Salah Abdeslam and an accomplice were handed the maximum sentence permissible over the incident in March 2016.