diff --git a/openslides/agenda/static/js/agenda/site.js b/openslides/agenda/static/js/agenda/site.js
index 319c87f81..160f168a6 100644
--- a/openslides/agenda/static/js/agenda/site.js
+++ b/openslides/agenda/static/js/agenda/site.js
@@ -186,7 +186,7 @@ angular.module('OpenSlidesApp.agenda.site', ['OpenSlidesApp.agenda'])
             }
         };
         // delete selected items only if items are customslides
-        $scope.delete = function () {
+        $scope.deleteMultiple = function () {
             angular.forEach($scope.items, function (item) {
                 if (item.selected) {
                     DS.destroy(item.content_object.collection, item.content_object.id);
diff --git a/openslides/agenda/static/templates/agenda/item-list.html b/openslides/agenda/static/templates/agenda/item-list.html
index dc218f6f1..31e1d99fe 100644
--- a/openslides/agenda/static/templates/agenda/item-list.html
+++ b/openslides/agenda/static/templates/agenda/item-list.html
@@ -105,9 +105,10 @@
   <div uib-collapse="!isDeleteMode" class="row spacer">
     <div class="col-sm-12 text-left">
       <!-- delete button -->
-      <a ng-show="isDeleteMode"
-          os-perms="agenda.can_manage" ng-click="delete()"
-          class="btn btn-primary">
+      <a ng-show="isDeleteMode" os-perms="agenda.can_manage"
+        ng-bootbox-confirm="{{ 'Are you sure you want to delete all selected agenda items?' | translate }}"
+        ng-bootbox-confirm-action="deleteMultiple()"
+        class="btn btn-primary">
         <i class="fa fa-trash fa-lg"></i>
         <translate>Delete selected items</translate>
       </a>
diff --git a/openslides/assignments/static/templates/assignments/assignment-list.html b/openslides/assignments/static/templates/assignments/assignment-list.html
index 241710377..c6cf2bfa2 100644
--- a/openslides/assignments/static/templates/assignments/assignment-list.html
+++ b/openslides/assignments/static/templates/assignments/assignment-list.html
@@ -61,9 +61,10 @@
   <div uib-collapse="!isDeleteMode" class="row spacer">
     <div class="col-sm-12 text-left">
       <!-- delete button -->
-      <a ng-show="isDeleteMode"
-          os-perms="assignments.can_manage" ng-click="deleteMultiple()"
-          class="btn btn-primary">
+      <a ng-show="isDeleteMode" os-perms="assignments.can_manage"
+        ng-bootbox-confirm="{{ 'Are you sure you want to delete all selected elections?' | translate }}"
+        ng-bootbox-confirm-action="deleteMultiple()"
+        class="btn btn-primary">
         <i class="fa fa-trash fa-lg"></i>
         <translate>Delete selected elections</translate>
       </a>
diff --git a/openslides/users/static/templates/users/user-list.html b/openslides/users/static/templates/users/user-list.html
index f1ac4af20..98e6c6281 100644
--- a/openslides/users/static/templates/users/user-list.html
+++ b/openslides/users/static/templates/users/user-list.html
@@ -92,8 +92,9 @@
       </select>
       <!-- delete button -->
       <a ng-show="selectedAction == 'delete'"
-          ng-click="deleteMultiple()"
-          class="btn btn-default">
+        ng-bootbox-confirm="{{ 'Are you sure you want to delete all selected users?' | translate }}"
+        ng-bootbox-confirm-action="deleteMultiple()"
+        class="btn btn-default">
         <i class="fa fa-trash fa-lg"></i>
         <translate>Delete selected participants</translate>
       </a>