Action has been taken against an alleged Islamist terror plot in the UK that could have happened at Christmas, counter terrorism sources say.
Four men were arrested early on Tuesday in South Yorkshire and Derbyshire.
An Army bomb disposal team cordoned off a street in Chesterfield where a 31-year-old man was arrested. Nearby homes were evacuated.
Three other men aged 22, 36 and 41 were arrested in the Burngreave and Meersbrook areas of Sheffield.
All four suspects were detained on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism under Section 41 of the Terrorism Act 2000.
They have been taken to a police station in West Yorkshire for questioning. The cordon in Chesterfield was later lifted.
The cordon around one of the properties – the Fatima community centre on Brunswick Road in Burngreave – was extended on Tuesday afternoon and the bomb disposal unit attended.
A large number of police vehicles and officers were outside the two-storey building. The main door appeared to be broken on the ground.
Five raids at houses took place on Tuesday at:
Shirebrook Road in Meersbrook, Sheffield
two addresses in Burngreave, Sheffield – including Fatima Community Centre on Brunswick Road
a house on King Street North in Chesterfield
an address in Stocksbridge
Four men were arrested – all at their home addresses.
one in Chesterfield
two in Burngreave
one in Meersbrook…