The resale value of Pokémon cards has sky-rocketed in the past year, leading to tense confrontations in stores, The Guardian reports.

One incident last week saw a 35-year-old man draw a gun in the car park outside a Target store in Wisconsin.

Target has said it will stop selling Pokémon card as well as MLB, NFL and NBA sports cards.

The retailer said the decision was taken “out of an abundance of caution” and the cards could still be purchased online.