Police said they believe a string of armed robberies victimizing elderly women throughout the city may be related. 

The NYPD released surveillance stills earlier this month after a 91-year-old woman was targeted by the suspect on March 2 as she entered her Brooklyn apartment building.

The victim told investigators the man placed her in a chokehold, displayed a handgun and pushed her inside the building in the 500 block of 9th Street. After robbing her, police said a man came across the pair and was also robbed at gunpoint. Victims told police the suspect ran off with about $370. 

Now, after another armed robbery on March 19, police released more information about that and two other robberies, committed by a man with a similar description. 

On Jan. 20, a man followed a 76-year-old woman inside of her residence near Myrtle Avenue and Weirfield Street, put his hands over her mouth and pushed her inside her home. Victims told police he demanded money at knifepoint and later pointed a gun at an 87-year-old male, asking for more cash. The suspect then fled the scene with about $800, police said. 

RELATED: New Yorkers can now check on neighborhood crimes through new website

On Feb. 11, a man stole $375 after he followed a 71-year-old woman into her home near Prospect Place and Sixth Avenue, tried to tie her up and struck her in the mouth with a gun. 

Most recently, on March 19, a man again followed a 43-year-old man into his home at Prospect Place and Carlton Avenue and asked for money. Victims told police the robber then saw an 81-year-old woman, and approached her with a gun, demanding money. Victims told police he left with about $330. 

The suspect is described as a black male, 40 to 50 years old, approximately six feet tall and weighing 250 pounds. He was last seen wearing a dark-colored hooded sweater, a black jacket, a black wool cap, black gloves, light-colored pants and dark-colored shoes. 

Anyone with information in regards to these robberies is asked to call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). The public can also submit their tips by logging onto the Crime stoppers website at or by texting their tips to 274637 (CRIMES) then enter TIP577. All calls are strictly confidential.​