diff --git a/src/s1ap/handlers/detach_req.c b/src/s1ap/handlers/detach_req.c
new file mode 100644
index 0000000..5ff68d2
--- /dev/null
+++ b/src/s1ap/handlers/detach_req.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2003-2018, Great Software Laboratory Pvt. Ltd.
+ * Copyright (c) 2017 Intel Corporation
+ * Copyright (c) 2019, Infosys Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <pthread.h>
+
+#include "err_codes.h"
+#include "options.h"
+#include "ipc_api.h"
+#include "main.h"
+#include "s1ap.h"
+#include "s1ap_config.h"
+#include "sctp_conn.h"
+#include "s1ap_structs.h"
+#include "s1ap_msg_codes.h"
+#include "msgType.h"
+
+
+extern int g_enb_fd;
+extern ipc_handle ipc_S1ap_Hndl;
+
+int
+detach_stage1_handler(struct proto_IE *detach_ies, bool retransmit)
+{
+	struct s1_incoming_msg_data_t req= {0};
+
+	/*****Message structure***
+	*/
+	log_msg(LOG_INFO, "Parse s1ap detach request message\n");
+
+	/*Validate all eNB info*/
+
+	/*Add eNB info to hash*/
+
+	/*Create Q structure for detach stage 1 to MME.
+	  contains init UE information.*/
+	/* TODO : Revisit, in InitialContextSetup Request we are sending
+	 * MME UE S1AP Id as M-TMSI.
+	 */
+	req.msg_type = detach_request;
+	for(int i = 0; i < detach_ies->no_of_IEs; i++)
+    {
+        switch(detach_ies->data[i].IE_type)
+        {
+            case S1AP_IE_MME_UE_ID:
+                {
+                    if (!retransmit)
+                    {
+                        req.ue_idx = detach_ies->data[i].val.mme_ue_s1ap_id;
+                    }
+                }break;
+            case S1AP_IE_ENB_UE_ID:
+                {
+                    req.s1ap_enb_ue_id = detach_ies->data[i].val.enb_ue_s1ap_id;
+                }break;
+            case S1AP_IE_NAS_PDU:
+                {
+                    if(retransmit)
+                    {
+                        req.msg_data.detachReq_Q_msg_m.ue_m_tmsi = ntohl(detach_ies->data[i].val.nas.elements[0].pduElement.mi_guti.m_TMSI);
+                    }
+                }break;
+            default:
+                log_msg(LOG_WARNING,"Unhandled IE");
+        }
+    }
+
+	req.destInstAddr = htonl(mmeAppInstanceNum_c);
+	req.srcInstAddr = htonl(s1apAppInstanceNum_c);
+	send_tipc_message(ipc_S1ap_Hndl, mmeAppInstanceNum_c, (char *)&req, S1_READ_MSG_BUF_SIZE);
+
+	/*Send S1Setup response*/
+	log_msg(LOG_INFO, "Send to mme-app stage1.\n");
+
+	return SUCCESS;
+}
+
+