A third person has been arrested after two people suffered burns and breathing problems when they found canisters of mustard gas in woods in Lincolnshire.
The containers were discovered on Sunday by people "bottle digging" at Roughton Woods near Woodhall Spa – also known as Ostler Plantation.
Specialist teams will conduct a search at a property in Woodhall Spa following today's arrest. A man and a woman from Lincoln remain in police custody.
As the enquiry into the items found at Roughton continues, police say the primary focus remains on maximising the safety of the public in the local area. There is not thought to be any risk to the public, but advice remains not to go to areas where there is an ongoing police presence.