Police are investigating an strange robbery in Luzerne County.

Hanover Township police call it an unusual crime; one they haven't seen before.

Just before 8 a.m. Monday a man wearing a red mask, hoodie and gloves walked into a blood center, showed a gun and robbed the place. It happened at the Interstate Blood and Plasma Center in Hanover Township.

"Nothing surprises me anymore, nothing surprises me," said a woman whose daughter works in the center.

No one was injured, but everyone was frightened by what happened.

"I just never thought a place like that would get robbed but it's not that hard. I mean in there they have very little security and everything," said Jacob Horton of Towanda. He gives blood and plasma at the center twice a week for $50 dollars.

He said someone must have known the way the center works to rob the place.

"It definitely had to be somebody who knew about it because they said he came in the front door and he snuck out the back door. The back door doesn't even have an exit sign or anything," Horton added.

Fellow donor Janet Ulrich agreed. "Because they pay cash here, I think it was somebody who knew the system and how they work and knew that first thing in the morning would be the easiest time to do it," Ulrich said.

Police said the robber took off and ran along the railroad tracks behind the plasma center.

Anyone with information on the holdup is asked to call police at 570-825-1254.