After robbing three people at gunpoint early Saturday morning, Bethlehem police said the suspect shook his victims' hands – an odd gesture that police said was not so polite.

"It's not so polite to point a gun at people and rob them," said police Lt. Mark DiLuzio. "The really polite thing for this guy to do is to come into the station, apologize for what he did and turn himself in. But I doubt that's going to happen."

No one was injured in the robbery that happened around 2 a.m. at a home in the 500 block of E. Fifth Street, police said. At least two of the victims who live at the home are students at Northampton Community College, police said.

According to police:

Brittany Ruggiero, 23, told police she answered a knock at the door and found a man outside asking for "Chris." Police said Ruggiero lives at the home, along with Christopher Chamberlain, 21, and David Hagstrand, 19.

Police said the man pushed his way inside and pulled out a black handgun and demanded cash. He had the three victims sit down in the living room, took their cell phones and removed the batteries. The suspect later returned the phones to the victims.

The man stole an X-Box gaming system, three video games and one dollar each from two victims.

Before leaving, the man shook the victims' hands and asked them not to call police before running west on Fifth Street.

The victims waited about an hour before reporting the robbery around 3:15 a.m., police said. The victims told police they were worried the man would come back and kill them.

The suspect is a dark-skinned man of unknown ethnicity. He's about 25 years old, 6 feet tall and about 160 pounds. He has brown eyes, some facial hair and was wearing a green puffy jacket and black ball cap.

Anyone with information may call the police crime tip line at 610-691-6660.