[Zope-CMF] How to exclude thread on list?

[Yoke May Seow]

Hi!

I would like to list all the items on a folder but not the threads (i.e.
comments on news items). How do I accomplish this task? currently, part of
my code looks like this:

<dtml-let newsitems="portal_catalog.searchResults(folder_name='ICT',
sort_on='Date', sort_order='reverse', review_state='published')">


also, why can't I see the comments on the CMF environment?

Rgds,
Yoke May