RELATED: Watch the surveillance video
The first incident happened Saturday morning June 16th at 6:15 a.m. in the 400 block of Christian Street. Police say the man approached a woman who walking down the street, grabbed her from behind by the neck and assaulted her.
He then took her purse and fled.
The second incident took place Sunday morning June 17th at 7:25 a.m.in the 600 block of Catharine Street, near the location where the surveillance video was recorded.
A woman walking on the street noticed a man on a dark colored bicycle with a white "T" shirt covering his face circling the block.
Police say the suspect approached that woman from behind, grabbed her by the neck and forced her to the ground. He took her purse containing $300 in cash, various credit cards and identification and then fled east on Catharine Street.
Police are describing the suspect as a black male in his 20s, 5'9 to 6' tall, medium to light complexion wearing a light t-shirt. In one of the cases the victim saw him riding an older model black pedal bike.
Anyone with information is being asked to call South Detectives at 215-686-3013 or -3014.