diff --git a/tabellio/icalimport/icalimport.py b/tabellio/icalimport/icalimport.py
index 74b2245..884b9bd 100644
--- a/tabellio/icalimport/icalimport.py
+++ b/tabellio/icalimport/icalimport.py
@@ -32,6 +32,9 @@ class IcalImport(BrowserView):
             urlopen = urllib2.urlopen
         content = urlopen(url).read()
         parsed_cal = vobject.readOne(content)
+        seen_ids = []
+        created = 0
+        updated = 0
         for vevent in parsed_cal.vevent_list:
             title = vevent.summary.value
             date_start = vevent.dtstart.value
@@ -71,6 +74,9 @@ class IcalImport(BrowserView):
             event_id = self.plone_utils.normalizeString(base_id % base_parts)
             if not hasattr(self.context, event_id):
                 self.context.invokeFactory('tabellio.agenda.event', event_id, title=title)
+                created += 1
+            else:
+                updated += 1
             event = getattr(self.context, event_id)
             event.title = title
             event.start = date_start
@@ -105,5 +111,13 @@ class IcalImport(BrowserView):
                 self.portal_workflow.doActionFor(getattr(self.context, event_id), 'publish')
             except WorkflowException:
                 pass
+            seen_ids.append(event.id)
 
-        return 'OK'
+        deleted = 0
+        for event_id in self.context.objectIds():
+            if event_id in seen_ids:
+                continue
+            self.context.manage_delObjects(event_id)
+            deleted += 1
+
+        return 'OK (created: %s, updated: %s, deleted: %s)' % (created, updated, deleted)