Police have discovered some material which was thought to be explosive when they searched for a suspect in an outbuilding at Bitterne Triangle in Southampton.
The incident happened around 11.30pm last night. A bomb disposal unit was called in to deal with the material.
A police spokesperson said the incident is isolated and involved no risk to the public.
A 28-year-old Southampton man was arrested on suspicion of making an explosive substance. He remains in custody at Southampton Central police station.
More top news
Very windy with heavy rain moving east tonight. Becoming drier but staying windy later. Then sunny spells and strong winds tomorrow
Heavy rain and strong winds this evening. The rain will clear tonight but staying windy, especially along the coast
Hampshire police arrest seven more men in investigation into an alleged conspiracy to commit serious sexual offences on the Isle of Wight.