A second reported sexual assault in South Boston was prompting new efforts to track down an unidentified suspect Wednesday.

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A woman said she was assaulted near Boston and Mayhew streets around 3 a.m. Saturday by a man who approached her from behind, police said Wednesday. The suspect then fled on foot down Mayhew Street back toward Boston Street, police said.

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Investigators described the suspect as a Hispanic male in his early 20s, between 5 feet nine and 5 feet 10 inches tall, and wearing a dark, “aviator or varsity style” jacket, police said.

That description appeared similar to one provided after another incident July 16, during which a woman reported she was also approached from behind and touched inappropriately, by a Hispanic male in his early 20s wearing a dark-colored shirt and camouflage shorts.

Police described that man as standing five feet seven to five feet nine inches tall.

That incident reportedly happened in the area of Farragut Road, and the suspect allegedly fled down that street toward East First Street.

“At present, the BPD has no information – other than the proximity of the incidents – to indicate that the assaults are connected,” police said in a release.

Police accept tips at the CrimeStoppers Tip Line at 1-800-494-TIPS or via text by sending the word TIP to CRIME (27463). Boston Police said in the release they promise to protect tipsters' identities.