Luton Town have slammed an alleged Watford fan who chucked flares into the Championship's Kenilworth Road ground during the minute's silence honouring Prince Philip.
As the Hornets and Hatters players stood arm-in-arm paying tribute to the Duke of Edinburgh, who died last week aged 99, yellow and red smoke could be seen billowing across the pitch towards the teams.
The Bedfordshire club released a tweet saying: 'To the Watford fan who didn't realise the yellow and red flare thrown into the ground would turn orange.
The smoke bomb was thrown into the ground from outside, according to the hosts Luton
Plumes of red and yellow smoke clouded the Watford and Luton players during the tribute
'You car registration plate has been passed on to the authorities.