NASHUA - Police want the public's help in finding the man who threatened to stab an employee in a gas station robbery last September.

The Shell gas station, 301 Main St., was robbed at 8:10 p.m. on Sept. 29. The man threatened to stab an employee although police said no weapon was shown. He fled on foot before officers arrived.

The robber is described as a white man with "very tan" skin. He is believed to be in his late 20s to early 30s, about 5-foot-8 to 5-foot-9 and weighing 160 pounds. The employee described him as having a very thin, long face with high cheekbones and a "sunken" looking face. The robber was clean-shaven and believed to have green eyes.

He was wearing a gray knit hat, red fleece-style jacket with a small logo on the left upper arm, dark cargo-style sweatpants and brown shoes. He was last seen running west on Lake Street.

Anyone with information about the robber or the incident itself is asked to call police at 594-3500. To remain anonymous, call Nashua Crime Line at 589-1665.