diff --git a/src/Util/Broadcaster.php b/src/Util/Broadcaster.php
new file mode 100644
index 0000000..600b701
--- /dev/null
+++ b/src/Util/Broadcaster.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Util;
+
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
+use Symfony\Component\HttpFoundation\RequestStack;
+use Symfony\Component\Mercure\HubInterface;
+use Symfony\Component\Mercure\Update;
+use Twig\Environment;
+
+readonly class Broadcaster
+{
+    public function __construct(
+        #[Autowire(service: 'twig')]
+        private Environment $renderer,
+        private HubInterface $hub,
+        private RequestStack $requestStack,
+    ) {}
+
+    public function alert(string $title, string $message): void
+    {
+        $userAlertTopic = $this->requestStack->getCurrentRequest()->getSession()->get('mercure_alert_topic');
+        $update = new Update(
+            $userAlertTopic,
+            $this->renderer->render('broadcast/Alert.stream.html.twig', [
+                'alert_id' => uniqid(),
+                'title' => $title,
+                'message' => $message,
+            ])
+        );
+        $this->hub->publish($update);
+    }
+}