Black Widow spiders have been recovered from a business on Teesside.
They were discovered by employees at a company which does not want to be named.
It's thought that the highly poisonous North American spiders may have travelled to the UK in a freight shipment.
They were caught by wildlife expert Jack Fenwick from Guisborough-based Naturally Wild Consultants.
Mr Fenwick said that, while the Black Widow is highly venomous, fatalities from bites are rare.
More top news
The company's CEO said its Sunderland plant would lose competitiveness if Brexit leads to them having to pay import EU tariffs
British Steel, has announced that it is on track to return to profit for the financial year ending 31 March 2017.
The library will move into newly refurbished premises at the local leisure centre later this year as part of a £1 million scheme.