Pic: Celtic fans unfurl huge banner to tell Leigh Griffiths how he should behave

Leigh Griffiths was left in no doubt as to how the Celtic fans felt about his alleged recent outburst of racist singing against Hearts.

Griffiths is a former Hibernian player (pic below) and a self-confessed fan who joined Celtic in January. However in recent weeks he has been caught up in controversy after allegedly been spotted singing derogatory songs about Hibs' bitter Edinburgh rivals, Hearts. The songs were aimed at a former Hearts player Rudi Skacel, implying he was a refugee. The matter is under investigation from the police, Celtic and the SFA. Celtic fans didn't take too kindly to the negative publicity and before the game against Inverness at the weekend, they unfurled banners (see below) with messages for Griffiths. One read: 'A man must be a Celt on and off the field otherwise he is of no value to this club'. Another banner read: 'refugees welcome, created by immigrants' which gives a nod to Celtic's formation in 1888.

banner from the Green Brigade today. a clear message to Leigh Griffiths. brilliant from the section. pic.twitter.com/XgggnORm8N — Standard Vodka (@Goggles1312) April 27, 2014

  Griffiths went on to score in the 6-0 thrashing of Inverness making it seven goals in just eleven games for Celtic. He is clearly a player who could have a good career at Celtic, but will need to toe the line sooner rather than later to avoid annoying the passionate hordes at Celtic Park.