Detectives from the Met Police Counter Terrorism Command have today, Saturday 12 September, arrested a man in his 20s at an address in Cambridge, on suspicion of attempting to cause an explosion, or making or keeping explosives with intent to endanger life or property, contrary to Section 3 of the Explosive Substances Act 1883.
An arrest was carried out at 9.13am with the assistance of Cambridgeshire Constabulary Armed Response Unit as a precautionary measure.
The man has been detained under the Police and Criminal Evidence Act and taken into custody at a south London police station.
Officers are currently searching two addresses in Cambridge.
The arrest relates to a suspicious package received via post at a residential address in north London. Police were called shortly after 9:10hrs on Thursday, 10 September, to reports of a suspicious package in Cricklewood. Specialist officers attended and made safe what was assessed to be a small improvised explosive device.
Police subsequently left the area. There is no risk to the local community.
Enquiries are ongoing.