Police swooped on a Leeds housing estate on Bank Holiday Monday after reports of suspicious material in a house.
A bomb disposal team was pictured on Dufton Approach in Seacroft and there was a large police presence as a property was searched.
West Yorkshire Police confirmed that items have been seized from the address and a 38-year-old man has been arrested for possession of explosive substances.
The force stated that the incident was not terror-related and the investigation has established there was no threat to the wider public or local residents.
Enquiries are ongoing.