By CBS 2 Chicago Staff

CHICAGO (CBS) — A man stabbed an assailant who was attacking him early Tuesday at the Sedgwick Brown Line station on the city’s Near North Side, police said.

At 6:47 a.m., the 45-year-old man was entering the turnstile at the station on Sedgwick Street just below North Avenue when another man, 46, followed him in and began physically attacking him, police said.

READ MORE: Chicago Weather: A Few Sprinkles Overnight

The assailant at one point hit the victim with a cone, police said.

READ MORE: Video From Police Shooting That Killed Adam Toledo To Be Released On Thursday, COPA Says

The victim eventually stabbed the assailant in the upper chest, police said.

The assailant was taken to Northwestern Memorial Hospital in good condition, police said. The victim was not injured.

MORE NEWS: Five Things We Know About The Adam Toledo Police Shooting Case

Police said the stabbing was deemed to have been in self-defense. Charges against the assailant who was stabbed were unknown Tuesday afternoon, and Area Three detectives were processing the case.

CBS 2 Chicago Staff