More than four tons of illegally stored fireworks have been seized in Stoke-on-Trent.
A raid was carried out on Tuesday on what is being described as business premises in the north of the city.
Trading standards officers say the fireworks were being stored without the licence required by law.
They say the hoard could have been potentially life-threatening.
The imported fireworks were seized after co-operation between the police, fire service and city council.
The raid comes a day after trading standards officers seized fireworks they say were being sold illegally at a car boot sale in Stafford.
Iain Baddeley, a trading standards officer in Stoke-on-Trent, said: "Anyone who keeps fireworks for supply has to either be registered or hold a licence or has to be a store passed by ourselves or the Health and Safety Executive.
"There are rules as to how you can store them and in what quantities and all of these fireworks were effectively stored illegally."