This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

A cleaning woman working at a Clive business Friday night became a robbery victim.

It happened just after 11 p.m. at Billion Collision Center off 114th Street in Clive.

The 24-year-old woman was alone in the building and went to the front doors to check on an alarm, police said.

When she did, an unknown man approached her from behind, covered her head with a trash bag and held a knife to her throat.

She woke up on the bathroom floor with her hands tied behind her back.  The woman was able to free herself and call 911.

It’s unknown if anything was stolen from the business.

So far, police have not made any arrests.