Police Scotland have charged a man in connection with an assault on Hearts goalkeeper Zdenek Zlamal during the Edinburgh derby on Wednesday.
Zlamal appeared to be struck by a supporter as he retrieved the ball in the goalless draw between Hearts and Hibernian at Tynecastle.
Hibs boss Neil Lennon was also felled by a missile thrown from the crowd, with the former Northern Ireland international later describing the treatment he received as "racism".
Police made five arrests over incidents at the Edinburgh derby, with both assistant referees struck by missiles during the fiery clash, and a man was charged on Thursday for an attack on one of the officials.
On Sunday, police confirmed another man was arrested and charged in connection with the assault on Zlamal. The 21-year-old has been released and will appear in court at a later date.
Hearts manager Craig Levein condemned the scenes, saying: "I just think it's abhorrent. I don't mind people being committed fans who are aggressive in their support, but throwing things isn't on.
"The stadium itself is fantastic with fans right on top of the players. At times it can be a bit like a cauldron. I'm just disappointed it happened and I got a fright when I saw Lenny [Lennon] lying on the ground. There's no place for that."
At a press conference ealrier this week, Hibs boss Lennon spoke of his outrage at the way he is treated in Scotland and criticised those who claimed he was at fault.
"You call it sectarianism here in Scotland, I call it racism," the former Celtic manager said. "If a black man is abused, you're not just abusing the colour of his skin - you're abusing his culture, heritage, his background.
"It's the exact same when I get called a Fenian, a pauper, a beggar, a tarrier. These people have a sense of entitlement, or a superiority complex, and all I do is stand up for myself.
"Pretty poor, all this, 'I was goading people, I brought it on myself'. There was an effigy outside Tynecastle saying, 'hang Neil Lennon', that was before the game.
"Did I bring that on myself? You're all saying no, because you're right-minded people, you're decent people. So this has got to stop. Everyone says I play the victim - I don't."