diff --git a/src/blockchain/fork_choice.cpp b/src/blockchain/fork_choice.cpp
index 3d79548..46a1c5b 100644
--- a/src/blockchain/fork_choice.cpp
+++ b/src/blockchain/fork_choice.cpp
@@ -311,10 +311,11 @@ namespace lean {
   outcome::result<void> ForkChoiceStore::onAttestation(
       const SignedAttestation &signed_attestation, bool is_from_block) {
     // First, ensure the attestation is structurally and temporally valid.
+    auto source = is_from_block ? "block" : "gossip";
     if (auto res = validateAttestation(signed_attestation); res.has_value()) {
-      metrics_->fc_attestations_valid_total()->inc();
+      metrics_->fc_attestations_valid_total({{"source", source}})->inc();
     } else {
-      metrics_->fc_attestations_invalid_total()->inc();
+      metrics_->fc_attestations_invalid_total({{"source", source}})->inc();
       return res;
     }
 
diff --git a/src/blockchain/fork_choice_metrics.def b/src/blockchain/fork_choice_metrics.def
index b46555d..31bab14 100644
--- a/src/blockchain/fork_choice_metrics.def
+++ b/src/blockchain/fork_choice_metrics.def
@@ -41,12 +41,14 @@
 METRIC_GAUGE(fc_head_slot, "lean_head_slot", "Latest slot of the beacon chain")
 
 // Attestation validation
-METRIC_COUNTER(fc_attestations_valid_total,
-               "lean_attestations_valid_total",
-               "Total number of valid attestations")
-METRIC_COUNTER(fc_attestations_invalid_total,
-               "lean_attestations_invalid_total",
-               "Total number of invalid attestations")
+METRIC_COUNTER_LABELS(fc_attestations_valid_total,
+                      "lean_attestations_valid_total",
+                      "Total number of valid attestations",
+                      {"source"})
+METRIC_COUNTER_LABELS(fc_attestations_invalid_total,
+                      "lean_attestations_invalid_total",
+                      "Total number of invalid attestations",
+                      {"source"})
 METRIC_HISTOGRAM(fc_attestation_validation_time_seconds,
                  "lean_attestation_validation_time_seconds",
                  "Time taken to validate attestation",