diff --git a/level_zero/core/source/device/bcs_split.cpp b/level_zero/core/source/device/bcs_split.cpp
index ce741eec42..06d56c564b 100644
--- a/level_zero/core/source/device/bcs_split.cpp
+++ b/level_zero/core/source/device/bcs_split.cpp
@@ -115,6 +115,7 @@ std::vector<CommandQueue *> &BcsSplit::getCmdQsForSplit(NEO::TransferDirection d
 }
 
 size_t BcsSplit::Events::obtainForSplit(Context *context, size_t maxEventCountInPool) {
+    std::lock_guard<std::mutex> lock(this->mtx);
     for (size_t i = 0; i < this->marker.size(); i++) {
         auto ret = this->marker[i]->queryStatus();
         if (ret == ZE_RESULT_SUCCESS) {
diff --git a/level_zero/core/source/device/bcs_split.h b/level_zero/core/source/device/bcs_split.h
index 9fe81e9884..22e542e3f0 100644
--- a/level_zero/core/source/device/bcs_split.h
+++ b/level_zero/core/source/device/bcs_split.h
@@ -37,6 +37,7 @@ struct BcsSplit {
     struct Events {
         BcsSplit &bcsSplit;
 
+        std::mutex mtx;
         std::vector<EventPool *> pools;
         std::vector<Event *> barrier;
         std::vector<Event *> subcopy;