diff --git a/src/controllers/ConversationsController.ts b/src/controllers/ConversationsController.ts
index 73b4a5b..b98d597 100644
--- a/src/controllers/ConversationsController.ts
+++ b/src/controllers/ConversationsController.ts
@@ -202,6 +202,29 @@ export class ConversationsController {
 		h.send(h.send(messages.map(e => this.ConversationMessageToAPI(e))));
 	}
 
+	/**
+	 * Send a new message
+	 * 
+	 * @param h Request handler
+	 */
+	public static async SendMessage(h: RequestHandler) {
+		const convID = await this.GetPostConversationId("conversationID", h);
+		const message = removeHTMLNodes(h.postString("message", 0));
+
+		if(message.length < 3)
+			h.error(401, "Message is empty!");
+		
+		// Send message
+		await ConversationsHelper.SendMessage({
+			userID: h.getUserId(),
+			convID: convID,
+			message: message,
+			imagePath: ""
+		});
+		
+		h.success("Conversation message was sent!");
+	}
+
 	/**
 	 * Get and return safely a conversation ID specified in a $_POST Request
 	 * 
diff --git a/src/controllers/Routes.ts b/src/controllers/Routes.ts
index 47f2200..dd68007 100644
--- a/src/controllers/Routes.ts
+++ b/src/controllers/Routes.ts
@@ -60,6 +60,8 @@ export const Routes : Route[] = [
 	{path: "/conversations/refresh", cb: (h) => ConversationsController.RefreshList(h)},
 
 	{path: "/conversations/refresh_single", cb: (h) => ConversationsController.RefreshSingleConversation(h)},
+
+	{path: "/conversations/sendMessage", cb: (h) => ConversationsController.SendMessage(h)},
 	
 
 	// Search controller
diff --git a/src/entities/ConversationMessage.ts b/src/entities/ConversationMessage.ts
index f357df0..05f9cd0 100644
--- a/src/entities/ConversationMessage.ts
+++ b/src/entities/ConversationMessage.ts
@@ -6,15 +6,19 @@ import { pathUserData } from "../utils/UserDataUtils";
  * @author Pierre HUBERT
  */
 
-export interface ConversationMessageInfo {
-	id: number,
+// Used directly when creating a new message
+export interface BaseConversationMessage {
 	convID: number,
 	userID: number,
-	timeSent: number,
 	imagePath: string,
 	message: string
 }
 
+export interface ConversationMessageInfo extends BaseConversationMessage {
+	id: number,
+	timeSent: number,
+}
+
 export class ConversationMessage implements ConversationMessageInfo {
 	public id: number;
 	public convID: number;
diff --git a/src/helpers/ConversationsHelper.ts b/src/helpers/ConversationsHelper.ts
index f4f12d8..83b06cc 100644
--- a/src/helpers/ConversationsHelper.ts
+++ b/src/helpers/ConversationsHelper.ts
@@ -1,7 +1,7 @@
 import { Conversation, BaseConversation } from "../entities/Conversation";
 import { DatabaseHelper } from "./DatabaseHelper";
 import { time } from "../utils/DateUtils";
-import { ConversationMessage } from "../entities/ConversationMessage";
+import { ConversationMessage, BaseConversationMessage } from "../entities/ConversationMessage";
 
 /**
  * Conversations helper
@@ -295,6 +295,53 @@ export class ConversationsHelper {
 		});
 	}
 
+	/**
+	 * Insert a new message into the database
+	 * 
+	 * @param message The message to insert
+	 */
+	public static async SendMessage(message: BaseConversationMessage) {
+
+		const t = time();
+
+		// Insert the message in the database
+		await DatabaseHelper.InsertRow(
+			MESSAGES_TABLE,
+			{
+				conv_id: message.convID,
+				user_id: message.userID,
+				time_insert: t,
+				message: message.message,
+				image_path: message.imagePath
+			}
+		);
+
+		// Update the last activity of the conversation
+		await DatabaseHelper.UpdateRows({
+			table: LIST_TABLE,
+			where: {
+				id: message.convID
+			},
+			set: {
+				last_active: t,
+			}
+		});
+
+		// Mark all the user of the conversations as unread, except current user
+		await DatabaseHelper.UpdateRows({
+			table: USERS_TABLE,
+			where: {
+				conv_id: message.convID
+			},
+			customWhere: "user_id != ?",
+			customWhereArgs: [message.userID.toString()],
+			set: {
+				saw_last_message: 0
+			}
+		});
+
+	}
+
 	/**
 	 * Get the list of members of a conversation
 	 * 
diff --git a/src/helpers/DatabaseHelper.ts b/src/helpers/DatabaseHelper.ts
index f091b7e..d7d37aa 100644
--- a/src/helpers/DatabaseHelper.ts
+++ b/src/helpers/DatabaseHelper.ts
@@ -26,6 +26,8 @@ export interface QueryInformation {
 export interface UpdateInformation {
 	table: string,
 	set: Object,
+	customWhere ?: string,
+	customWhereArgs ?: Array<string>,
 	where ?: Object,
 }
 
@@ -227,8 +229,22 @@ export class DatabaseHelper {
 				}
 			}
 		}
-		else
+
+		// Security : block unconditionned updates
+		else if(!info.customWhere)
 			throw Error("Error : Updates without conditions are blocked for security!");
+
+		// Process custom conditions
+		if(info.customWhere) {
+
+			if(info.where)
+				sql += " AND (" + info.customWhere + ") ";
+			else
+				sql += " WHERE " + info.customWhere + " ";
+
+			if(info.customWhereArgs)
+				info.customWhereArgs.forEach(e => args.push(e));
+		}
 		
 		// Execute request
 		return await new Promise((resolve, reject) => {