Fifteen to 20 people armed with knives and metal pipes clashed at around 11:30 p.m. Sunday on Anadyrsky Proyezd, near the Babushkinskaya metro station, the report said, citing the police.
A police official told RIA-Novosti that it was unclear whether race played a role in the fight.
It was the third report of brawls between ethnic Russians and natives of the Caucasus in Moscow in less than a week.
A spokeswoman for the city police's northeastern district branch confirmed that the incident took place but said the fight broke out after passers-by yelled at a drunk man for urinating on a kiosk. "The man was rebuked, but he didn't listen," she said. "This was the result."
Only five people were involved in the scuffle, and no one was hospitalized, she said. She declined to give further details, citing the ongoing investigation.
Some 30 to 40 people of non-Slavic appearance attacked two young people of Slavic appearance on Manezh Square around 9 p.m. Thursday, the Novy Region news agency reported.
Twenty young people were involved in the fight between Russians and natives of the Caucasus in southeast Moscow on June 3, Interfax reported.
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