The Metropolitan Police has launched a terrorism investigation after grenades, a fake gun and various chemicals were found in a home in Suffolk.
A 59-year-old man was arrested first on suspicion of possession of a firearm, and then on suspicion of the commission, preparation or instigation of acts of terrorism.
Police raided a terraced house in Lowestoft early on Sunday afternoon.
Two inert military grenades and an imitation gun were found, along with various chemicals that led Suffolk Police to call in counter-terrorism investigators from the Metropolitan Police.
A 100-metre cordon was initially put in place and three neighbouring properties in Normanhurst Close evacuated as the inquiry continued.
A smaller cordon is still in place, and the man is in custody at a Suffolk police station.
Detective Chief Superintendent Alexis Boon, from the Met Police Counter Terrorism Command, said: “After a pre-planned operation by Suffolk Constabulary in which officers arrested a man, the Met Police Counter Terrorism Command is now leading this investigation, working closely with police in Suffolk.
“Suffolk Constabulary acted quickly to make the area safe, including erecting a cordon around the address as a precautionary measure while inquiries are ongoing, however we have found nothing to suggest an ongoing threat to the public.