Police in Brooklyn are looking for a man they say tried to rape a woman at knifepoint.

Investigators say the man in the above sketch threatened the 24-year-old in Bedford-Stuyvesant around 6 a.m. Sunday.

He allegedly forced her to follow him to an alley on Louis Place near Atlantic Avenue. That's where police say he groped and put his mouth on the woman.

She fought him off until he stole her cellphone and ran away, according to police.

"It's frightening because I got kids that live near here also, and somebody walking up like this and basically, most people not hearing about it, makes it even worse again," said one person in the neighborhood. "It's really a safe block, and nothing really happens around here, so I'm surprised to see it."

Authorities say the man was also caught on surveillance video.

He is described as being in his 30s and was last seen wearing blue shorts and a brown shirt.

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-TIPS, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.