German police early Wednesday arrested a young Bosnian man and conducted several searches in the west of the country to investigate the financing of an “[extremist] terrorist attack.”

Axar.az informs, citing AFP, the 27-year-old suspect was arrested in an early morning operation by a specialized police unit in the Essen and Dortmund region, local police and the public prosecutor’s office said in a statement.

They did not give details about the planned attack, including where or how it was to be carried out, but said the investigation was ongoing.

According to the German daily Bild, the suspect had received military training.

Several searches have been carried out in the region at the homes of other people, who are currently considered witnesses.

The police investigation began due to suspicions of organized fraud, and authorities later determined that the funds collected “were to be used to finance an [extremist] terrorist attack”, the statement said.