The Heerlen police arranged extra protection for the Grotius College and its school grounds. The College's director, teachers and students received threats in response to the suicide of 15-year-old student Tharukshan Selvam on Sunday, AD reports.
A suspicious package left at the Heerlen city hall last week Wednesday contained a threatening letter addressed to th city's mayor Ralf Krewinkel, according to lawyer Sjanneke de Crom, ANP reports.
De Crom represents the person suspected of leaving the package. He was arrested on Thursday and released again on Tuesday. He remains a suspect.
The package was discovered during a city council meeting on Wednesday evening last week. Everyone was evacuated from the building and the Explosive Ordnance Disposal team was called to investigate.