The Pirkanmaa District Court in Tampere has remanded in custody two Iraqi twins suspected of involvement in a massacre in Iraq in 2014.
No audience members were allowed in the closed court proceedings.
The two 23-year-old men are accused of 11 terrorism-related murders near Tikrit in Iraq in the summer of 2014. The men were apprehended in Forssa on Tuesday and detained by police.
The two are suspected of featuring in an ISIS propaganda video on the Camp Speicher massacre, in which eleven men are shot from point blank range while tied up and face down on the floor.
This story was edited to reflect the result of the hearings.