A father and son are being questioned by anti-terrorism officers following the discovery of the poison ricin at a house in County Durham.
The find is connected to a police inquiry into alleged extreme right-wing activity.
Ian Davison, 41, and his son, Nicky, 18, were arrested on Tuesday in raids at their homes in County Durham.
The ricin, said to be 6,000 times more toxic than cyanide, will be analysed at the Porton Down government laboratory.
Police have halted their search of Mr Davison’s home in Myrtle Grove, Burnopfield, until tests on the substance, found in a sealed jam jar, have been completed.
We do not believe that there is any risk to public health
Asst Ch Con Michael Barton
The former pub DJ’s son was detained at his home in Annfield Plain on suspicion of inciting racial hatred but is now also being held under the Terrorism Act.
It is understood his father is being questioned by Durham officers and the North East Counter Terrorism Unit at a police station in West Yorkshire.
