Deadly snakes found in house.
Stunned police found 16 highly-venomous snakes in bedrooms at a terrace house in Liversedge - including nine puff adders and a cobra.
The puff adder is responsible for more deaths than any other African snake.
It is very common but also has poisonous venom that is produced in large amounts and long fangs.
Now police and wildlife experts are carrying out detailed checks to find out where the reptiles came from.
A man has been bailed pending further investigations.
Police said they obtained a search warrant for the end terrace house under The Control in Trade of Endangered Species Regulations after a tip-off that a man living there had a king cobra.
West Yorkshire wildlife officer Bryan Butterworth, together with Spen Valley Neighbourhood Policing Team officers, an animal Health inspector from Kirklees Council and a Defra wildlife inspector from Heathrow Airport executed the warrant.
A spokesman said: "Although there was no king cobra at the address, there were 16 other highly-venomous snakes in the house.
"To possess these snakes the keeper must have a licence issued under the Dangerous Wild Animals Act 1976 and there were none in place.
"The wildlife inspector also noted that the snakes were been kept in totally unsuitable conditions.
"All the snakes were seized and are now under the care of an expert."
In addition to the puff adders, the investigators found a snouted cobra, a rhino viper, a British adder and four Dinokistrodons.
Police also found a Mississippi alligator skull and a Nile alligator skull which are believed to have been brought into the UK illegally.
The investigation is now being handled by wildlife experts from Kirklees Council and Defra.
* SEIZED: A snouted cobra, above, and a deadly puff adder, below (S)