UPDATE query not updating all columns

I am trying to update 3 columns to be blank, when I run the query only 1 columns are being set to NULL and the site and e1remains unchanged.
d1 being changed to NULL

UPDATE links SET d1=NULL AND e1=NULL AND site=NULL WHERE site LIKE '%zoo1%'

Code (markup):

 

Instead of "AND" put ",".

 

thanks works great