diff --git a/api/modules/internal/controllers/AccountsController.php b/api/modules/internal/controllers/AccountsController.php
index 2c86fd3..fd4eb56 100644
--- a/api/modules/internal/controllers/AccountsController.php
+++ b/api/modules/internal/controllers/AccountsController.php
@@ -3,8 +3,12 @@ namespace api\modules\internal\controllers;
 
 use api\components\ApiUser\AccessControl;
 use api\controllers\Controller;
+use api\modules\internal\models\BlockForm;
+use common\models\Account;
 use common\models\OauthScope as S;
+use Yii;
 use yii\helpers\ArrayHelper;
+use yii\web\NotFoundHttpException;
 
 class AccountsController extends Controller {
 
@@ -24,7 +28,28 @@ class AccountsController extends Controller {
     }
 
     public function actionBlock(int $accountId) {
+        $account = $this->findAccount($accountId);
+        $model = new BlockForm($account);
+        $model->load(Yii::$app->request->post());
+        if (!$model->ban()) {
+            return [
+                'success' => false,
+                'errors' => $model->getFirstErrors(),
+            ];
+        }
 
+        return [
+            'success' => true,
+        ];
+    }
+
+    private function findAccount(int $accountId): Account {
+        $account = Account::findOne($accountId);
+        if ($account === null) {
+            throw new NotFoundHttpException();
+        }
+
+        return $account;
     }
 
 }