Another two men have been arrested in connection with “the singing of racist material” before an Old Firm match at Ibrox on Sunday.
A total of eight people have been charged since the incident on August 29.
Footage on social media appeared to show Rangers fans being escorted by police through Glasgow city centre ahead of the game against Celtic chanting an anti-Irish song referencing the famine.
Police had said they expected to make “numerous arrests”.
On Friday night, Police Scotland announced a 20-year-old man and a 23-year-old man had been arrested and released on an undertaking to appear at a later date.
On Wednesday, police arrested and charged three men aged 24, 21, and 19 in relation to the incident.
On Friday morning, three other individuals, aged 26, 23, and 21, were also arrested.
In a statement issued on Thursday, Rangers said they had written to three individuals to confirm their indefinite ban from all club fixtures.
The club said it condemned “all forms of racism, sectarianism and discrimination”.
A report will be submitted to the Procurator Fiscal, police said.
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