A stranger stabbed a 25-year-old woman in an unprovoked Tuesday evening rush hour attack on the staircase of a Manhattan subway station, cops and sources said.
The victim was walking down the stairs inside the 23rd Street C and E train station in Chelsea around 6:30 p.m. when the maniac plunged what appeared to be a knife into the left side of her back, according to authorities and sources.
Son fatally stabs dad — victim stumbles out of NYC building then collapses on sidewalk: cops…