The office of Belgium’s federal prosecutor says two underage people suspected of plotting what has been labelled a terror attack have been arrested.

Aged 16 and 17, the suspects were arrested on 31 October after raids in the cities of Eupen and La Calamine, located in the province of Liège. The prosecutor’s office said they were suspected of “attempted terrorist assassination and participation in a terrorist organisation.”

The two minors have been placed in a youth protection centre. According to Belgian broadcaster RTBF, the suspects had recorded a video of allegiance to Islamic State and were suspected of planning a stabbing attack against police officers.

Read more: The Guardian (UK)