Chesterfield counter terrorism operation - what we know so far

By The Newsroom
Published 19th Dec 2017, 14:03 BST
Updated 19th Dec 2017, 14:10 BST
The Army's Bomb Disposal Team has been at a property in Chesterfield.The Army's Bomb Disposal Team has been at a property in Chesterfield.
The Army's Bomb Disposal Team has been at a property in Chesterfield.
Four men, including a 31-year-old from Chesterfield, have been arrested as part of a counter terrorism operation this morning.

Here's what we know so far.