14 men have been jailed for a total of 82 years for a cannabis operation in Norfolk and Kent worth £25 million a year.
Buxton: 4th Arrest After Explosive Device Found
The man, in his 30s and from the Norwich area, was arrested on suspicion of offences under the Explosives Act and remains in police custody.
Heart's being told a house in Middletons Lane in Hellesdon, Norwich is being searched in connection with the enquiry.
Detectives from Norfolk Police have placed a seal on the property and Army Explosives experts are helping them.
Neighbouring properties can be reassured that they are not in any danger.
Police say they're treating damage at a butchers in Norwich as a hate crime.
A seven-year-old girl drowned at her best friend's birthday pool party while there was no lifeguard on duty, an inquest heard.
Police say search of the Milton landfill site cannot continue after officers conduct fingertip search since March
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