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
Kevin Phillips is the latest name to be added the bookmakers' favourite. Here's a look at the runners and riders.
David Moyes has had a rollercoaster ride on Wearside since taking the Sunderland AFC manager's job in the summer
David Moyes hoped he would be able to turn Sunderland around when he was appointed in the summer - but leaves them a Championship club