Philadelphia police are investigating multiple reports of sexual assaults where women were groped in Center City this summer.

The five alleged sexual assaults happened between July 18 and Aug. 3, according to police. Four of the assaults happened in Center City, and the fifth and most recent happened in South Philadelphia.

Police on Monday released photos of the suspect wanted in connection with the sexual assaults. They said the suspect is about 25-30 years old with long braids that are sometimes worn in a ponytail. He's roughly 6 feet tall.

On July 18, a woman told police she was walking her dog at around 6:40 a.m. in the 1900 block of Spruce Street when a man approached her, allegedly saying, "Good morning, beautiful." He then allegedly groped her. 

The following day, on July 19, a woman said she was trying to get into her apartment building in the 2000 block of Delancey Street shortly before 3:15 a.m. when a man approached her. She asked him to leave her alone and pushed him away. He then sexually assaulted her and pushed her to the ground, according to police.

Then on Aug. 2, at around 8:15 a.m., a woman was on the 1600 block of Waverly Street when she said a man approached her from behind, reached over her shoulder and sexually assaulted her, police said.

The following day, on Aug. 3, a woman said she was walking to her car on the 400 block of South 15th Street at around 1 a.m., when a man came up from behind and sexually assaulted her.

Later that day, at 12:30 p.m., a woman said she was near her garage along the 2500 block of Webster Street in South Philly when a man walked up from behind and sexually assaulted her. 

With three attacks happening over the weekend, investigators see this as escalating behavior. 

"As a woman, you're kind of always walking around like aware of your surroundings, hoping that the worst won't happen, and just to hear that the worst has been happening is frightening," Mackenzie Lee said as she spoke with CBS News Philadelphia on Waverly Street.

Police believe there could be more victims. 

"If anyone that hasn't made a report, definitely come to Special Victims [Unit] to make a report," SVU Capt. Margo Alleyne-Parker said. "And for those who live in the area, definitely check your cameras to see if you have this male on camera."

Officials say no weapons were pulled on the victims during the assaults. 

Additionally, in most instances, neighbors came out to help after hearing the victims' screams and got them to safety.

"Stuff like this, I think, happens a lot more than is talked about, so it's a shame that there had to be as many incidents as there were for this to kind of get the recognition that it is," Lee said.

Garrett Van Helmondt lives on South 15th Street and said everyone should be taking extra precautions right now.

"Carry pepper spray," Van Helmondt said. "Keep an eye out for your surroundings. Don't be checking your phone when you're walking. Walk with a friend."

"You don't like to see things like this; it's really scary for everyone who lives in the area," he added.

Temple University students, Tala Abdeljaber and Morgan Barnes, live close to one of the areas where an attack was reported and have just returned from studying abroad. 

"We just were in Japan, I felt like I was able to have my guard down for a few months, and then I came back, and this is like happening right in my neighborhood and I'm like 'jeez, I have to lock in,'" Abdeljaber said.

Barnes agreed, "This is like my first day back in the city since, and I'm like headphones off. Head on a swivel."

Morgan Bell lives on Spruce Street and said the sexual assaults are concerning, especially as a woman. 

"This is generally a safe neighborhood and I've never felt unsafe walking around here, but it definitely makes me on guard," she said.