BOSTON (CBS) – An 18-year-old man and a 17-year-old girl are both in critical condition after being shot in Dorchester late Wednesday night.

Officers were called to Michigan Avenue just before 10 p.m. for a report of shots fired. They found two teenagers on nearby Ellington Street, both suffering from gunshot wounds. They were rushed to local hospitals. Their names have not been made public.

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Police Commissioner William Gross said it appears the teens left the shooting scene on a motorized scooter.

“Teenagers shot on the street. It’s not acceptable,” he said.

Witnesses said they heard more than 20 shots. There have been no arrests.

This incident comes just after two other shootings left the community shaken on Tuesday. In one of those, a man was shot on Wildwood Street. He died Thursday, police said.

A Boston Police cruiser in the Michigan Street neighborhood Thursday. (WBZ-TV)

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Back in June, a man was shot and killed on Michigan Street.

Witnesses are afraid to identify themselves because no one has been arrested in the shootings.

“A little boy comes walking down the street and he has blood dripping down his side,” said one woman who was parked outside of a corner market when it happened.

A woman who has four sons and lives in the neighborhood said, “It’s very traumatic to have to go to work daily and worry whether or not your children are going to leave to go to a corner store, leave to go to work, leave to go to school and they’re going to be shot along their way.”

District Attorney Rachael Rollins said the perpetrators would be held accountable.

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Shameika Mitchell and her 11-year-old daughter just moved to Ellington Street, where police found the two injured teenagers. She says they moved, hoping it would be safer. “It’s tough. There’s nowhere else to go. My uncle died from gun violence. My sister died from gun violence,” she said. “I wish people would really put the guns down.”