A Chicago woman was charged with first-degree murder after a 7-year-old girl was fatally stabbed in the city's East Chatham neighborhood, authorities said.

Shavon Gayden, 48, was taken into custody minutes after the stabbing occurred late Saturday morning along South Cottage Grove Avenue near East 86th Street.

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The girl was walking down the sidewalk when a woman who did not know her approached and stabbed her in the back multiple times, police said. In surveillance video obtained by NBC Chicago, witnesses could be seen rushing over to what is believed to be the area where the young girl was attacked.

Several witnesses could also be seen running away from the scene to chase down the suspect. Police said the bystanders detained the woman, and she was later taken into custody after receiving treatment at a local hospital for injuries she sustained while being detained.

Surveillance video obtained by NBC Chicago shows people rush to help a 7-year-old girl who was stabbed to death and detain the suspect.

The girl was later identified by the Cook County Medical Examiner's Office as Eddimar Paola Hernández Chacón. Ald. Michelle A. Harris, of the city's 8th Ward, said Eddimar and her 16-year-old sister were in the area to pay a phone bill at the Boost Mobile store.

The sisters were followed by the woman after leaving the store. Authorities haven't said what, if anything, prompted the attack.

On Sunday, relatives gathered for a vigil, where they called for justice for their young loved one.

A prayer circle formed as family members and neighbors gathered to mourn, and white balloons were released into the sky in Eddimar's memory.

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