In a customs building at Schiphol, five people became unwell on Tuesday evening due to an unknown substance found in a confiscated suitcase, reports the Kennemerland Safety Region. It is still unknown what the substance is. Defense specialists are present for research.

The substance is not dangerous for public health, a spokesperson for the safety region told NU.nl. The complaints of the employees who have become unwell are also decreasing again.

However, research by the fire brigade and experts from Defense has not yet made clear what the good is or what it is. Soldiers of the CBRN team (Chemical, Biological, Radiological or Nuclear) are going to do a second investigation.

If there is still no clarity after the second test, the substance is isolated and taken to a laboratory for examination. "Then the location at Schiphol will in any case be secured again," says the safety region.