Three different people have been robbed at knifepoint on Dublin Street in the Carrollton neighborhood in recent weeks, and police are seeking the public’s help in identifying a suspect photographed by surveillance camera.

In the first case, a man left an Oak Street business about 10:30 a.m. Aug. 25 and was followed by a stranger on a bicycle until he reached Dublin Street, police said. There, the bicyclist cut in front of the victim, jumped off the bike, pulled a knife and said, “I’ll stab the shit out of you, grandpa. Give me your wallet,” police said. The victim did so, and the robber left on the bicycle.

The victim’s wallet was later found at the intersection of Pearl and Husso streets and examined for fingerprints. Prior to the robbery, the suspect is believed to have been in the same business as the victim attempting to sell a watch, police said.

Shortly after 10 a.m. Aug. 29, a woman used the ATM at the Whitney Bank and then walked down Willow Street to Dublin, then noticed a man nearby on a bicycle, police said. He rode up and demanded her purse, and she struggled to hang on to it until he pulled a knife and said, “I’ll hurt you,” police said. The suspect then left, but was captured on an RTA security camera at the streetcar barn.

About 10 a.m. Friday (Sept. 2), a woman was walking in the 1800 block of Dublin when she was approached from behind by a stranger who grabbed her computer bag, police said. This woman also tried to fight the man off, but he pulled out a knife and threatened to stab her, so she let go.

The suspect in each of the cases has been described as a thin, 5-foot-9 black man with a low haircut. In the Sept. 2 case, he was wearing a dark shirt and light-colored pants. The bicycle he rode in two of the cases was a mountain bike, and the knife had a wood handle.

Police are also investigating another robbery at knifepoint in the area that took place at Dante and Panola at 1 a.m. Aug. 29. That case does not appear to be related, noted Sgt. Chris Billiot of the Second District persons-crimes division, as it involved to perpetrators, took place in the middle of the night instead of in broad daylight, and may have been drug related. Investigators are keeping the possibility of a connection open, however.

Anyone with information about these cases should call Detective Jerry Baldwin or Sgt. Chris Billiot of the NOPD Second District at 658-6024, or, to leave an anonymous tip that could be eligible for a cash reward, call CrimeStoppers at 822-1111.