Citing police dispatch reports, at approximately 4 a.m., authorities were called to the Marathon gas station at 6262 North Clark Street.
According to police, a 911 caller observed a white female in a blue car screaming for help.
The driver was described as a shirtless black male with his pants partially down.
When police arrived around 4:04 a.m., the car was gone, said a responding officer.
About five minutes later, an officer in the area was flagged down by a woman who said she was raped.
At 4:14 a.m., a police supervisor was requested.
At 4:57 a.m., officers were instructed to check the security cameras at the gas station.
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