The NYPD released a sketch of a suspect accused of threatening subway riders in downtown Manhattan and robbing them of cash and an iPhone.

According the NYPD, both incidents occurred last week. The first happened was on Tuesday, September 22nd, at 7:30 p.m., when a 30-year-old woman on a southbound 1 train was approached by an unknown man. Police say the man "threatened to cut her with an object and demanded her property." The victim gave him $40 in cash and then the suspect fled. The victim was not injured.

Then a few hours later at 1:30 a.m. on Wednesday, September 23rd, a 29-year-old woman was threatened by the same man on a southbound 1 train. Police say the suspect "said he would stab her if she did not hand over her cash." Then the suspect allegedly punched her in the face and chest before taking her iPhone 4S and $48. The victim refused medical attention.

The suspect is described as being in his early 40s, 5' 10" and 160 pounds with a thin build and pockmarks under both eyes.

Anyone with information in regards to this incident is asked to call the NYPD's Crime Stoppers Hotline at 800-577-TIPS. The public can also submit their tips by logging onto the Crime Stoppers website or texting their tips to 274637(CRIMES) then entering TIP577. All calls are strictly confidential.