The case marks the first time in Finnish history that the National Bureau of Investigation (NBI) will take part in a criminal terrorist investigation.
The case itself has remained somewhat shrouded in mystery since, in autumn of 2011, it was revealed that persons resident in Finland had outside links with the Somali terrorist organisation, Al-Shabaab.
Preliminary police investigations point the finger at a total of six people, all of whom deny having committed any crime.
Ringleader suspected of three terrorism related crimes
The NBI suspects the main perpetrator -- a man resident in Finland -- of committing three separate terrorist offences, including financing terrorism, recruiting persons for the purposes of terrorism and preparing for a criminal act with terrorist intent.
The suspicion of financing terrorism relates to some thousands of euros.
"The sum may seem small in Finland, but money collected for terrorist purposes is often accumulated from a multitude of small sources,” the NBI’s head of investigations, Kaj-Erk Björkqvist, said in an Yle interview.
Five funders, one camp recruiter, say police
Alongside the lead suspect, four persons are suspected of involvement in funding terrorism, and another is under scrutiny for preparing for a criminal act with terrorist intent.
The matter is known to concern the recruitment of young men, in aggravated human trafficking-type conditions, for training in a terrorist camp.
Terrorist offences were first written into the Finnish criminal law under their own chapter exactly ten years ago. This case will represent the first time the new articles are actually put into practice.