A sickening sex-grope incident was reported in Brooklyn yesterday as cops searched for a grabby perv (sketch) suspected in several attacks.

Cops said a man fondled a woman on Seventh Avenue near 17th Street at about 1 a.m. yesterday, reaching inside her skirt and groping her buttocks.

Police are investigating if the attack fits a pattern of at least six others in Bay Ridge, Sunset Park and Park Slope that have women on high alert.

“When I’m alone, I hold my key between my fingers so I can stab someone if I have to,” said Jenna Krog, 23.