San Antonio police are asking for the public's help finding a man accused of attacking a 24-year-old woman inside her parked car while threatening her with a knife.

Police said the woman was parked in the 14000 block of Cross Canyon around 7:40 a.m. Saturday, May 23, when a stranger opened her car door.

Investigators said the man assaulted the woman while showing a knife, then left the area in a gray or silver Nissan.