Counter-terrorism police have arrested a man after a package containing a small improvised explosive device was sent to a residential address in London.

Metropolitan Police said the suspect was detained in Cambridge on Saturday morning on suspicion of attempting to cause an explosion, or making or keeping explosives with intent to endanger life or property.

The arrest was carried out with the assistance of Cambridgeshire Constabulary Armed Response Unit “as a precautionary measure”, the Met said.

The man was taken into custody at a south London police station and officers were searching two addresses in Cambridge.

The Met said: “The arrest relates to a suspicious package received via post at a residential address in north London.

“Police were called 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.”