Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_68828 ( "Date" text, "Location" text, "Nature of incident" text, "Circumstances" text, "Casualties" text )

### Question ###
What is the nature of the incident with Casualties of 3 wia, and Circumstances of ied?

### Accurate SQL ###

SELECT "Nature of incident" FROM table_68828 WHERE "Casualties" = '3 wia' AND "Circumstances" = 'ied'