RANGERS managing director Stewart Robertson has personally apologised to Celtic skipper Scott Brown for the abuse he received as he boarded his team's bus on Sunday.

Brown was filmed leaving Ibrox after his team recorded a 2-0 win over their rivals when a 15-year-old Rangers fan taunted the midfielder over the death of his sister.

The teenager has since been charged and arrested over the sicking abuse and Robertson has phoned Brown to apologise, and written to him personally in an email.

READ MORE: Old Firm stars of past and present rally behind Scott Brown after vile 'how's your sister?' taunt

A source told the Daily Record: "Scott was obviously deeply upset and angry about what was said but he has taken a great deal of comfort from the support he has received from all across the board over the last 24 hours.

“He didn’t want an issue to be made of this but, now that it has become public knowledge, he is grateful for support he’s received from all over and the swift and sincere response he’s had from Rangers as a club.”