BERLIN (AP) — German prosecutors say a man suspected of sending money to finance the Islamic State group has been arrested at Amsterdam airport.

Prosecutors said that the 29-year-old Russian national, identified only as Yusup B. because of German privacy rules, was arrested Thursday as he arrived from South America.

They said in a statement Friday that authorities in Berlin and the surrounding state of Brandenburg are investigating him on suspicion of supporting a terrorist organization. He is suspected of transferring money to suspects in Syria to finance training and weapons procurement for IS.

Prosecutors say that, after hearing about the investigation, he left for an unspecified destination in South America but investigators were able to track him down.