The delicate relations between two former Yugoslav republics took a bitter and bizarre turn on Thursday as Bosnia and Herzegovina’s security minister accused Croatia of concocting a plot intended to falsely paint Bosnia as a terrorist hotbed.

The security minister, Dragan Mektic, accused Croatia’s intelligence service of trying to coerce a Bosnian citizen into transporting weapons and explosives to a mosque inside Bosnia.

If the weapons were then discovered, Mr. Mektic said in an interview with The New York Times, the cache could be portrayed as part of a terrorist plot.

Top Croatian officials called the allegations groundless, saying they were an effort to damage ties between the two countries.

Read more: New York Times