Two carp anglers have been arrested on suspicion of drug dealing after police raided their bivvies.
Officers only twigged something was amiss when they noticed the well-equipped anglers didn't have any lines in the water.
Police had spotted a number of known drug users visiting Brickfield Ponds in Rhyl, North Wales, but when a search of the area failed to reveal anything, officers began chatting to a pair of carpers.
"We flooded the area, coming in from all sides," a North Wales Police officer said, "Only we couldn’t find any drug dealers.
"Disappointed, we started to talk to two fishermen on the banks of the ponds.
"They had all the gear; tent, waterproofs, top-of-the-range rods, bite alarms, enough food for a week."
The officers noted the lads were not local and had travelled from Liverpool, before spying an alarming selection of knives.
The officer said: "Our suspicions were raised further when we saw their knifes - hardly typical fishing knives, more likely knives to protect yourself from police raids and rival drug dealers!
"After realising that their lines weren’t even in the water we decided to investigate their story further and after finding a small amount of drugs and a large amount of cash the two were arrested."
A police sniffer dog named Otis then rooted around the swim and found a larger stash of cannabis hidden in the bushes.
"It was good try, lads, and very elaborate," said the copper, posting on the force's Denbighshire Facebook page.
"Some of the real fishermen we saw at the pond told us it was all expensive stuff.
"In truth it almost fooled us. Still, we’ll keep it safe for you and it can be collected after your prison sentences are finished."
Brickfield Ponds is run by Brickfield Angling Club. A spokesman said: "The club are shocked at this and have a zero tolerance to drugs and anti-social behaviour.
"Those involved are not members of the club.
"It was their first and last visit to fish the lake. It's a real shame [as] the club is working hard to make the fishery safe and enjoyable place."