Bosnians hunting cartoon critters in augmented reality run the risk of their play being interrupted by very real land-mine blasts, a Bosnian group has warned.

Demining charity Posavina bez mina said on its Facebook page that users of the hit cellphone app Pokémon Go are straying into dangerous territory while trying to “catch them all,” the ultimate goal of the game developed by Niantic. As of last year, Bosnia and Herzegovina still had an estimated 120,000 undiscovered landmines and pieces of unexploded ordnance left over from the early 1990s war, the BBC reports.

“We received information that some users of the Pokémon Go app in Bosnia were going to places which are a risk for mines, in search of a Pokémon,” the BBC’s translation of the warning reads. “Citizens are urged not to do so, to respect demarcation signs of dangerous mine fields and not to go into unknown areas.”

[BBC]

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Simon Lewis at simon_daniel.lewis@timeasia.com.