Five people have been arrested on drugs charges in the Limburg town of Vaals, including a minor, police said on Monday. The haul included a number of LSD stamps printed to resemble Pokémon cards.

Four of the five – three men, one woman and a teenage boy – were picked up last Thursday following a tip-off from a “foreign” police force.

Two men aged 24 and 27 from Vaals were arrested in a car while meeting a 29-year-old Belgian national. A search of the vehicle turned up more than 100 ecstasy pills, 220 grammes of amphetamine and 15 bags of cocaine.

Later that night, police searched a private home and confiscated more drugs, including the Pokémon LSD stamps. The woman was also arrested at the property.

The teenager later reported to the police. Officers have not ruled out further arrests as the investigation continues.

Vaals is located on the Dutch border with both Belgium and Germany.