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A 16-year-old girl was hit, held at gunpoint and sexually assaulted at a West Side home Monday evening before she escaped Tuesday morning and fled to an “L” stop to seek help, police said.

The girl told police she was assaulted about 6 p.m. Monday in an Austin neighborhood home of someone she knew in the 1000 block of North Lorel Avenue, according to police.

The girl went to the female acquaintance’s home about 5 p.m., according to police. Not long after she got there, the acquaintance punched her in the face and pointed a gun at her, and a male attacker sexually assaulted her, according to police.

The girl told police she was able to leave the home about 9 a.m. Tuesday and ran to the Green Line for help before police found her in the 5100 block of West Lake Street, near the Laramie Avenue station, police said.

The girl was taken to West Suburban Medical Center in Oak Park.

No one was in custody Tuesday night.