ORLANDO, Fla. (AP) — A Jamaican accused of trying to check a bag containing pipe bomb-making materials onto a plane told the FBI he wanted to show friends how to build explosives like he saw in Iraq, according to documents released Wednesday.

The FBI was still trying to determine whether Kevin Brown was ever in Iraq. Investigators noted he first told them he wanted to detonate the materials on a tree stump in Jamaica.

Brown did not speak at a brief court hearing Wednesday where he was ordered held without bail while prosecutors reviewed his mental health records.