A 27 year old Sussex man is in custody tonight, after being arrested under anti-terrorist legislation.
Armed officers swooped on an address in the village of Petworth just after midday, after reports of of poisonous gas coming from a house in Sheepdown Drive.
The man was arrested in his bed and Hazardous Chemical experts from the West Sussex Fire Service, dressed in NBC suits, entered the property.
3 hours later, a swing-top bin was removed from the kitchen for further tests.
"We believe the object removed to be a rudimentary device to make poisonous gas." Chief Superintendent Roger Owen told reporters.
"Either that or it's a bin that's not been emptied for at least 2 months."
Locals say the raid this afternoon has shaken the sleepy village.
"It's shaken this sleepy village" Gordon Matthews, a regular at the local Black Horse Inn says. "I mean, the last time anything like this happened here was during the English Civil War. Not even when old Terry McGrath went crazy with a shotgun and killed 90 sheep and 4 phone boxes did we see anything like the response we saw today."