There are claims that parts for what would be the first-ever gun produced in Britain by 3D printing, may have been seized by police in Manchester.
They were recovered during a week long operation against organised crime.
Detectives have sent the items for testing, but the owner of the shop where they were found strongly denies they were for a firearm, saying they were in fact parts from the printer itself.
This report from Adam McClean
More top news
Manchester United and England football captain Wayne Rooney has signed up as the NSPCC's first ambassador for childhood.
A mother has paid an emotional tribute to the people who helped her find her missing three-year-old son after he went missing in Liverpool.
The forecast for this week