diff --git a/public/i18n/locale-en.json b/public/i18n/locale-en.json
index 1ec75d1..71aeea6 100644
--- a/public/i18n/locale-en.json
+++ b/public/i18n/locale-en.json
@@ -1,6 +1,7 @@
 {
   "ERRORS": {
     "repository_job_cancelled": "The repository changed or was removed while processing.",
+    "storage_delete_failed": "Unable to remove cached files. Please try again later.",
     "unknown_error": "Unknown error, contact the admin.",
     "unreachable": "Anonymous GitHub is unreachable, contact the admin.",
     "request_error": "Unable to download the file, check your connection or contact the admin.",
diff --git a/src/core/storage/S3.ts b/src/core/storage/S3.ts
index 1113508..94fd1a9 100644
--- a/src/core/storage/S3.ts
+++ b/src/core/storage/S3.ts
@@ -102,7 +102,13 @@ export default class S3Storage extends StorageBase {
       // nothing to remove
       return;
     }
-    await this.client(200000).deleteObjects(params);
+    const result = await this.client(200000).deleteObjects(params);
+    if (result.Errors?.length) {
+      throw new AnonymousError("storage_delete_failed", {
+        httpStatus: 502,
+        object: result.Errors,
+      });
+    }
 
     if (data.IsTruncated) {
       await this.rm(repoId, dir);
diff --git a/test/production-regressions.test.js b/test/production-regressions.test.js
index 73e370f..1e575ee 100644
--- a/test/production-regressions.test.js
+++ b/test/production-regressions.test.js
@@ -79,6 +79,21 @@ describe("production regressions", function () {
     });
   }
 
+  function s3(client) {
+    stub(config, "S3_BUCKET", "test");
+    const S3 = require("../src/core/storage/S3").default;
+    const storage = new S3(); storage.client = () => client; storage.repoPath = () => "repo";
+    return storage;
+  }
+  it("rejects S3 per-object deletion failures", async function () {
+    const storage = s3({
+      listObjectsV2: async () => ({ Contents: [{ Key: "repo/data" }] }),
+      deleteObjects: async () => ({ Errors: [{ Key: "repo/data", Code: "AccessDenied" }] }),
+    });
+    try { await storage.rm("repo", "data"); throw new Error("expected rejection"); }
+    catch (error) { expect(error.message).to.equal("storage_delete_failed"); }
+  });
+
   for (const status of ["removing", "removed", "expiring", "expired"]) {
     it(`ignores delayed downloads for ${status} repositories`, async function () {
       stub(db, "connect", async () => {});