Police, fire and paramedics are on scene at the corner of Union and Randolph Sts. in west Windsor investigating a mysterious substance found in a residence.
The Windsor Fire Hazmat team has evacuated and cordoned off an entire block of housing units.
Multiple witnesses on scene describe a resident received an envelope in the mail from Sri Lanka which contained a white powdery substance, h0wever this story has not yet been confirmed by officials.
Officials are staying mum on the situation and details are scarce at this hour as an investigation continues.