Lincoln police say they're looking for three men behind two apparently unrelated residential robberies Thursday in which the men said they were coming to collect debts.

In both cases, the victims said they didn't know the men.

In the first, a 31-year-old man was in the living room of his girlfriend's house in a north Lincoln neighborhood at about 1 p.m. when a man came in without knocking and said he wanted the money the other man owed him, Lincoln Police Officer Katie Flood said.

Problem is, he said, he didn't know the intruder and didn't owe him money.

Flood said the intruder picked up a glass ashtray and hit the victim with it several times, breaking his nose, before he gave up $200 in cash he had on him.

Then the intruder left out the same door he had used to enter the house near 70th and Holdrege streets.

The victim was taken to St. Elizabeth Regional Medical Center, where he was treated for his injuries.

He described his attacker as Hispanic or Native American, 25 to 35 years old, 6 feet tall, 180 to 200 pounds, with a goatee and a number of tattoos on his forearms and legs.

Police combed the area, but couldn't find the man.

The second robbery happened near 40th and F streets about 10:45 p.m. Thursday.

Flood said two men entered an unlocked door of a home and told a 54-year-old man and a 49-year-old woman they were there "to collect the money you owe Justin."

The couple told police later they didn't know who Justin was.

The men took something from a hallway closet and left, but the couple told police they couldn't tell what they had taken.

The men didn't have a weapon and did not threaten to hurt the couple.

Reach Lori Pilger at 473-7237 or lpilger@journalstar.com.