diff --git a/constants/exceptions.py b/constants/exceptions.py
index 7a48813..b586ed1 100644
--- a/constants/exceptions.py
+++ b/constants/exceptions.py
@@ -95,4 +95,10 @@ class userAlreadyInChannelException(Exception):
 	pass
 
 class userNotInChannelException(Exception):
+	pass
+
+class missingReportInfoException(Exception):
+	pass
+
+class invalidUserException(Exception):
 	pass
\ No newline at end of file
diff --git a/constants/fokabotCommands.py b/constants/fokabotCommands.py
index 4026137..4bf86a8 100644
--- a/constants/fokabotCommands.py
+++ b/constants/fokabotCommands.py
@@ -1,7 +1,9 @@
 import json
 import random
+import re
 
 import requests
+import time
 
 from common import generalUtils
 from common.constants import mods
@@ -14,6 +16,7 @@ from constants import serverPackets
 from helpers import systemHelper
 from objects import fokabot
 from objects import glob
+from helpers import chatHelper as chat
 
 """
 Commands callbacks
@@ -694,6 +697,64 @@ def updateBeatmap(fro, chan, message):
 	except:
 		return False
 
+def report(fro, chan, message):
+	msg = ""
+	try:
+		# TODO: Rate limit
+		# Regex on message
+		reportRegex = re.compile("^(.+) \((.+)\)\:(?: )?(.+)?$")
+		result = reportRegex.search(" ".join(message))
+
+		# Make sure the message matches the regex
+		if result is None:
+			raise exceptions.invalidArgumentsException()
+
+		# Get username, report reason and report info
+		target, reason, additionalInfo = result.groups()
+		target = chat.fixUsernameForBancho(target)
+
+		# Make sure the target is not foka
+		if target.lower() == "fokabot":
+			raise exceptions.invalidUserException()
+
+		# Make sure the user exists
+		targetID = userUtils.getID(target)
+		if targetID == 0:
+			raise exceptions.userNotFoundException()
+
+		# Make sure that the user has specified additional info if report reason is 'Other'
+		if reason.lower() == "other" and additionalInfo is None:
+			raise exceptions.missingReportInfoException()
+
+		# Get the token if possible
+		chatlog = ""
+		token = glob.tokens.getTokenFromUsername(target)
+		if token is not None:
+			chatlog = token.getMessagesBufferString()
+
+		# Everything is fine, submit report
+		glob.db.execute("INSERT INTO reports (id, from_uid, to_uid, reason, chatlog, time) VALUES (NULL, %s, %s, %s, %s, %s)", [userUtils.getID(fro), targetID, "{reason} - ingame {info}".format(reason=reason, info="({})".format(additionalInfo) if additionalInfo is not None else ""), chatlog, int(time.time())])
+		msg = "You've reported {target} for {reason}{info}. A Community Manager will check your report as soon as possible. Every !report message you may see in chat wasn't sent to anyone, so nobody in chat, but admins, know about your report. Thank you for reporting!".format(target=target, reason=reason, info="" if additionalInfo is None else " (" + additionalInfo + ")")
+		adminMsg = "{user} has reported {target} for {reason} ({info})".format(user=fro, target=target, reason=reason, info=additionalInfo)
+
+		# Log report in #admin and on discord
+		chat.sendMessage("FokaBot", "#admin", adminMsg)
+		log.warning(adminMsg, discord="cm")
+	except exceptions.invalidUserException:
+		msg = "You can't report. I won't forget what you've tried to do. Watch out."
+	except exceptions.invalidArgumentsException:
+		msg = "Invalid report command syntax. To report an user, click on it and select 'Report user'."
+	except exceptions.userNotFoundException:
+		msg = "The user you've tried to report doesn't exist."
+	except exceptions.missingReportInfoException:
+		msg = "Please specify the reason of your report."
+	except:
+		raise
+	finally:
+		if msg != "":
+			chat.sendMessage("FokaBot", fro, msg)
+	return False
+
 """
 Commands list
 
@@ -713,7 +774,7 @@ commands = [
 		"callback": faq
 	}, {
 		"trigger": "!report",
-		"response": "Report command isn't here yet :c"
+		"callback": report
 	}, {
 		"trigger": "!help",
 		"response": "Click (here)[https://ripple.moe/index.php?p=16&id=4] for FokaBot's full command list"
diff --git a/helpers/chatHelper.py b/helpers/chatHelper.py
index b3a2242..27db4d0 100644
--- a/helpers/chatHelper.py
+++ b/helpers/chatHelper.py
@@ -175,6 +175,10 @@ def sendMessage(fro = "", to = "", message = "", token = None, toIRC = True):
 		if token.isSilenced():
 			raise exceptions.userSilencedException()
 
+		# Redirect !report to FokaBot
+		if message.startswith("!report"):
+			to = "FokaBot"
+
 		# Determine internal name if needed
 		# (toclient is used clientwise for #multiplayer and #spectator channels)
 		toClient = to
@@ -190,7 +194,6 @@ def sendMessage(fro = "", to = "", message = "", token = None, toIRC = True):
 			toClient = "#spectator"
 		elif to.startswith("#multi_"):
 			toClient = "#multiplayer"
-
 		# Truncate message if > 2048 characters
 		message = message[:2048]+"..." if len(message) > 2048 else message
 
@@ -216,6 +219,9 @@ def sendMessage(fro = "", to = "", message = "", token = None, toIRC = True):
 			if glob.channels.channels[to].publicWrite == False and token.admin == False:
 				raise exceptions.channelNoPermissionsException()
 
+			# Add message in buffer
+			token.addMessageInBuffer(to, message)
+
 			# Everything seems fine, build recipients list and send packet
 			glob.streams.broadcast("chat/{}".format(to), packet, but=[token.token])
 		else:
diff --git a/irc/ircserver.py b/irc/ircserver.py
index c353f89..06c6072 100644
--- a/irc/ircserver.py
+++ b/irc/ircserver.py
@@ -402,13 +402,15 @@ class Client:
 					self.replyCode(332, description, channel=channel)
 
 				# Build connected users list
-				users = glob.channels.channels[channel].connectedUsers[:]
+				if "chat/{}".format(channel) not in glob.streams.streams:
+					self.reply403(channel)
+					continue
+				users = glob.streams.streams["chat/{}".format(channel)].clients
 				usernames = []
 				for user in users:
-					token = glob.tokens.getTokenFromUserID(user)
-					if token is None:
+					if user not in glob.tokens.tokens:
 						continue
-					usernames.append(chat.fixUsernameForIRC(token.username))
+					usernames.append(chat.fixUsernameForIRC(glob.tokens.tokens[user].username))
 				usernames = " ".join(usernames)
 
 				# Send IRC users list
diff --git a/objects/osuToken.py b/objects/osuToken.py
index 162f43b..8183e4f 100644
--- a/objects/osuToken.py
+++ b/objects/osuToken.py
@@ -40,6 +40,7 @@ class token:
 		self.lock = threading.Lock()	# Sync primitive
 		self.streams = []
 		self.tournament = tournament
+		self.messagesBuffer = []
 
 		# Default variables
 		self.spectators = []
@@ -499,4 +500,25 @@ class token:
 		if self.awayMessage == "" or userID in self.sentAway:
 			return False
 		self.sentAway.append(userID)
-		return True
\ No newline at end of file
+		return True
+
+	def addMessageInBuffer(self, chan, message):
+		"""
+		Add a message in messages buffer (10 messages, truncated at 50 chars).
+		Used as proof when the user gets reported.
+
+		:param chan: channel
+		:param message: message content
+		:return:
+		"""
+		if len(self.messagesBuffer) > 9:
+			self.messagesBuffer = self.messagesBuffer[1:]
+		self.messagesBuffer.append("{time} - {user}@{channel}: {message}".format(time=time.strftime("%M:%S", time.localtime()), user=self.username, channel=chan, message=message[:50]))
+
+	def getMessagesBufferString(self):
+		"""
+		Get the content of the messages buffer as a string
+
+		:return: messages buffer content as a string
+		"""
+		return "\n".join(x for x in self.messagesBuffer)
\ No newline at end of file