diff --git a/tools/OWNERS b/tools/OWNERS
new file mode 100644
index 0000000..7a23adc
--- /dev/null
+++ b/tools/OWNERS
@@ -0,0 +1,2 @@
+per-file warn.py = chh@google.com
+per-file checkowners.py = chh@google.com
diff --git a/tools/releasetools/OWNERS b/tools/releasetools/OWNERS
new file mode 100644
index 0000000..39448cf
--- /dev/null
+++ b/tools/releasetools/OWNERS
@@ -0,0 +1 @@
+tbao@google.com