Some 115kg of cocaine concealed in concrete slabs were seized in Belgium on Saturday as part of an international police operation to dismantle a Serbian cocaine ring, announced local authorities.

According to a statement from the prosecutor's office, a total of nine people were arrested in relation to this large-scale operation: five in Belgium, two in the Netherlands, one in Luxembourg, and one in Serbia.

The drug seizure was made in Arlon during a warehouse search. At the time, "suspects were busy concealing cocaine in concrete slabs to facilitate their export," explained the prosecution.

At least 103 packages weighing more than one kilo each were discovered and confiscated. The estimated market value of the prohibited substances is €11.5 million.

Simultaneous searches were conducted in the Netherlands, Luxembourg, and Serbia. "In total, nearly 100 members of various police services were involved" in this operation, which "aims to dismantle a Serbian criminal organisation active in international cocaine trafficking", the prosecutor's office further noted.