Potassium nitrate , other chemicals , intended to be used in small quantities . Potassium is used in gunpowder but also has many legitimate uses . No major laws , or terror - related activities , police ##d . All round his Staten Island home was sealed off .
Potassium nitrate , other chemicals , intended to be sold in small quantities . Potassium nitrate used in gunpowder but also has many legitimate uses . No major laws broken or terror-related activities , man cooperating . Area round his Staten Island home was cordoned off .